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Worksheets

Question Bank for Grade 7 Science

Total questions: 212

Worksheet time: 35hrs 20mins

Name
Class
Date
1.
What is voltage?
a)

The amount of energy used by a circuit

b)

The measure of the electrical potential difference between two points in a circuit

c)

The flow of electric charge through a circuit

d)

The measure of how much a material or device opposes the flow of electric current

2.
What is the unit of measurement for voltage?
a)

Watts (W)

b)

Amperes (A)

c)

Volts (V)

d)

Ohms (Ω)

3.
What provides voltage in a circuit?
a)

Inductors

b)

Battery or power supply

c)

Resistors

d)

Capacitors

4.
What is resistance?
a)
The measure of how much a material or device opposes the flow of electric current
b)
The flow of electric charge through a circuit
c)
The measure of the electrical potential difference between two points in a circuit
d)
The amount of energy used by a circuit
5.
What is the unit of measurement for resistance?
a)
Volts (V)
b)
Ohms (Ω)
c)
Watts (W)
d)
Amperes (A)
6.
What is current?
a)
The flow of electric charge through a circuit
b)
The measure of how much a material or device opposes the flow of electric current
c)
The amount of energy used by a circuit
d)
The measure of the electrical potential difference between two points in a circuit
7.
Which terminal do electrons flow FROM in a circuit?
a)

Positive terminal

b)

Neither terminal

c)

Both terminals

d)

Negative terminal

8.
What affects the flow of current in a circuit?
a)
Voltage only
b)
Resistance only
c)
Neither voltage nor resistance
d)
Both voltage and resistance
9.
What will a higher voltage result in?
a)

A greater flow of current through the circuit

b)

No change in the flow of current through the circuit

c)

A change in the resistance of the circuit

d)

A lower flow of current through the circuit

10.
What will a higher resistance result in?
a)

A slower flow of current through the circuit

b)

No change in the flow of current through the circuit

c)

A change in the voltage of the circuit

d)

A faster flow of current through the circuit

11.
What is the measure of how much a material or device opposes the flow of electric current?
a)

Resistance

b)

Voltage

c)

Current

d)

Power

12.

What happens in a "short circuit"?

a)

The electrons go through the wire too fast because there is not enough resistance and the electricity gets drained.

b)

The electricity is diverted to an alternate path.

c)

The current is blocked from flowing through the circuit.

d)

The voltage is increased to an unsafe level.

13.
What is the flow of electric charge through a circuit?
a)

Power

b)

Voltage

c)

Resistance

d)

Current

14.

A PATH along which electricity can flow is a ___________________?

a)

light bulb

b)

switch

c)

insulator

d)

circuit

15.

When a circuit is open, the circuit is _________?

a)

On

b)

Off

16.

What is a material that allows energy to pass through easily?

a)

parallel circuit

b)

rubber band

c)

conductor

d)

electron

17.
this circuit is .....?
a)

open

b)

parallel

c)

closed

d)

The cutest little circuit evah!

18.

Most metals make good _______________________.

a)

conductors

b)

insulators

c)

circles

d)

electrons

19.

What is a material that resists, or does NOT allow, energy to flow through?

a)

circuit

b)

insulator

c)

series

d)

conductor

20.
An incomplete circuit is shown.
To complete the circuit, a wire should be placed from —
a)

Point D to Point C

b)

Point B to Point C

c)

Point A to Point D

d)

Point B to Point D

21.
This circuit has a battery, buzzer, and switch.
When the switch is closed the buzzer will sound because -
a)

the switch gives energy to the battery

b)

the buzzer is made of special plastic

c)

the wires are cooled by the surrounding air

d)

electricity can flow in a complete path

22.
Which of the following can work as an energy source?
a)

Battery

b)

Light bulb

c)

Wire

d)

All of them

23.

The device used to open and close circuits is called a ______.

a)

circuit

b)

wire

c)

switch

d)

open circuit

24.

A _____ is a pathway for the flow of electricity.

a)

receiver

b)

wire

c)

switch

d)

circuit

25.

Match the following

a)
1.

Battery

b)
2.

Fuse

c)
3.

Light bulb

d)
4.

Switch

e)
5.

Resistor

26.

Why is electrical wiring usually made from copper?

a)

Because copper is shiny

b)

Because copper conducts electricity

c)

Because copper is not magnetic

d)

Because copper insulate electricity

27.
Which bulbs will light?
a)

1 and 2

b)

2 and 3

c)

3 and 4

d)

4 and 2

28.

A material that does not allow electricity to flow through the circuit is known as a _____

a)

conductor

b)

insulator

c)

source

d)

switch

29.
What is a current?
a)

A constant flow of electricity 

b)

A path that a current can flow along

30.
What is a circuit?
a)

A constant flow of electricity 

b)

A path that a current can flow along

31.

An outlet in a wall and a battery are examples of __________.

a)

Power source 

b)

Load

c)

Energy pathway

d)

ALL of them 

32.

An electrician wears rubber gloves for protection.  The purpose of the rubber gloves is to --

a)

keep the electrician dry

b)

create an electrical circuit

c)

produce electricity

d)

protect the electrician

33.

Electricity is

a)

The charge of electrons

b)

The movement of electrons

c)

The movement of protons

d)

The charge of protons

34.

What acts as the conductor in lightning?

a)

The air particles

b)

The light

c)

The thunder

d)

Metal rods

35.
What process do plant cells use to get carbon out of the atmosphere?
a)

Photosynthesis

b)

Cellular respiration

c)

Combustion

d)

Decomposition

36.
What organisms are responsible for breaking down dead plants and animals?
a)

Scavengers

b)

Consumers

c)

Decomposers

d)

Producers

37.
What are fossil fuels formed from?
a)

Air

b)

Water

c)

Sunlight

d)

Leftover plant and animal matter

38.

True or False: Fossil Fuels can be all three states of matter (solid, liquid, and gas)

a)

True

b)

False

39.
What is the relationship between a country's wealth and energy consumption?
a)

The poorer a country is, the more energy it uses

b)

The richer a country is, the more energy it uses

c)

The richer a country is, the less energy it uses

d)

There is no relationship between a country's wealth and energy consumption

40.
What process extracts energy stored in carbon bonds of sugar and releases oxygen?
a)

Decomposition

b)

Combustion

c)

Cellular respiration

d)

Photosynthesis

41.
What is the role of CO2 in the greenhouse effect?
a)

It absorbs and re-emits infrared energy

b)

It cools the atmosphere

c)

It has no role in the greenhouse effect

d)

It reflects sunlight

42.
What are carbon pools?
a)

Places where carbon is released

b)

Places where carbon is consumed

c)

Places where carbon is transformed

d)

Places where carbon is stored

43.
What is the significance of carbon bonds in energy storage and release?
a)

Energy is stored in carbon bonds and released when they break

b)

Carbon bonds only release energy but do not store it

c)

Carbon bonds only store energy but do not release it

d)

Carbon bonds have no role in energy storage and release

44.
What are the products of combustion?
a)

Carbon dioxide and water

b)

Carbon dioxide and oxygen

c)

Carbon and water

d)

Oxygen and water

45.
What principle is demonstrated in chemical reactions, such as combustion?
a)

Conservation of charge

b)

Conservation of energy

c)

Conservation of matter

d)

Conservation of momentum

46.
What happens to carbon when it bonds with oxygen?
a)

It forms H2O

b)

It forms O2

c)

It forms CH4

d)

It forms CO2

47.
What is the main source of energy for photosynthesis?
a)

Carbon dioxide

b)

Sunlight

c)

Oxygen

d)

Water

48.
What happens to carbon when plants and animals die?
a)

It is released into the atmosphere

b)

It is converted into water

c)

It is stored in the soil

d)

It is transformed into sunlight

49.
What are the three main types of fossil fuels?
a)

Wood, peat, and biomass

b)

Coal, natural gas, and oil

c)

Uranium, plutonium, and thorium

d)

Solar, wind, and hydro

50.
What is the main purpose of combustion?
a)

To transfer energy

b)

To store energy

c)

To create energy

d)

To release energy

51.
What is the main source of energy for cellular respiration?
a)

Oxygen

b)

Sugar

c)

Water

d)

Carbon dioxide

52.
What are carbon fluxes?
a)

Places where carbon is consumed

b)

Places where carbon is stored

c)

Movements of carbon between pools

d)

Places where carbon is transformed

53.
What is the main source of energy for combustion?
a)

Water

b)

Carbon dioxide

c)

Fuel

d)

Oxygen

54.
What happens to the atoms in a chemical reaction?
a)

They remain unchanged

b)

They are rearranged

c)

They are created

d)

They are destroyed

55.
What is the main role of decomposers in the carbon cycle?
a)

To store carbon in the soil

b)

To produce oxygen

c)

To break down dead plants and animals

d)

To consume other organisms

56.
The following are part of the carbon cycle EXCEPT _________.
a)

respiration

b)

precipitation

c)

decomposition

d)

photosynthesis

57.

Green plants and algae make their own food through photosynthesis. What is photosynthesis?

a)

a cell process that uses energy from sunlight to convert water and oxygen into food

b)

a cell process that uses energy from sunlight to convert water and glucose into food

c)

a cell process that uses energy from sunlight to convert water and chlorophyll into food

d)

a cell process that uses energy from sunlight to convert water and carbon dioxide into food

58.

Where can you find carbon?

a)

Only in the Earth's atmosphere

b)

Inside all water molecules

c)

Inside the sun

d)

Inside every living thing on Earth

59.
The main source of energy for all life comes from ____.
a)

the Earth

b)

the moon

c)

the sun

d)

the food we eat/make

60.

If the plant population decreased, the amount of carbon in the atmosphere would _________.

a)

Stay the same

b)

Increase

c)

Decrease

61.

*Choose all that apply* What are benefits of photosynthesis?

a)

It makes food that plants and animals can use for energy

b)

It changes light energy from the sun into a form that can be used by living things

c)

It changes carbon into a form that can be used by living things

62.

How are cellular respiration and photosynthesis related?

a)

They are the same reaction, which means that their reactants (starting substances) and their products (ending substances) are exactly the same

b)

They are opposite reactions, which means the products (ending substances) of photosynthesis become the reactants (starting substances) of cellular respiration and vice versa

c)

Photosynthesis and cellular respiration are not related

63.

Which of the following living things is responsible for decomposition?

a)

Plants

b)

Animals

c)

Bacteria

64.

Choose the three fossil fuels

a)

natural gas

b)

water

c)

coal

d)

hydrogen

e)

oil

65.

If a forest fire occurs, what will happen to the carbon in the forest?

a)

It will go into the soil

b)

It will go into the atmosphere

c)

It will runoff into nearby streams and rivers

d)

It will be destroyed

66.

Where does all the carbon in organisms (living things) originate from?

a)

Earth's atmosphere

b)

Rocks

c)

Water

d)

Soil

67.
The diameter of the planet Mercury is 4.87 x 103 kilometers. The diameter of the planet Venus is 1.21 x 104 kilometers. The diameter of Earth is 1.28 x 104  kilometers. The diameter of Mars is 6.79 x 103 kilometers. Which planet has the smallest diameter?
a)
Mercury
b)
Earth
c)
Venus
d)
Mars
68.

You found the following number researching a specific amount of something. 35 million, 788, 744, 35,000, and 900. Which would be a reasonable estimate? [SELECT ALL THAT APPLY]

a)

35 million

b)

780

c)

1 million

d)

35,000

e)

807

69.

What are some reasons different sources might say different things? [SELECT ALL THAT APPLY]

a)

One is trustworthy and one is not

b)

They defined the question differently

c)

They were written at different times and the facts changed

70.

In decomposition, the carbon goes from...

a)

soil to ocean

b)

atmosphere to soil

c)

plants/animals to soil

d)

soil to fossil fuels

71.

How do fossil fuels work?

a)

Fossil fuels are created by the burning of organic matter.

b)

Fossil fuels are formed by the decomposition of living organisms.

c)

The sun's energy is captured in plants that never got decomposed and turned into fossil fuels which we burn

d)

Fossil fuels are created when the Earth's crust is heated and pressurized.

72.
What is combustion?
a)

The separation of a fuel into its component parts

b)

The combination of a fuel with oxygen

c)

The cooling of a fuel to its solid state

d)

The evaporation of a fuel into a gas

73.
What are the necessary components for combustion to occur?
a)
Fuel and water
b)
Fuel and carbon dioxide
c)
Fuel and oxygen
d)
Fuel and nitrogen
74.
What happens to the number of atoms during combustion?
a)
The number of atoms decreases
b)
The number of atoms increases
c)
The number of atoms stays the same
d)
The number of atoms fluctuates
75.
Which of the following is an example of combustion?
a)
Melting ice
b)
Boiling water
c)
Burning wood
d)
Mixing salt and water
76.
What is the role of oxygen in combustion?
a)
To cool down the fuel
b)
To break apart the fuel
c)
To combine with the fuel
d)
To remove impurities from the fuel
77.
What is the role of fuel in combustion?
a)
To combine with oxygen
b)
To remove impurities from oxygen
c)
To cool down oxygen
d)
To break apart oxygen
78.
What is the result of combustion?
a)
A decrease in temperature
b)
A release of energy
c)
A solid substance
d)
A decrease in pressure
79.

Which of the following are the products in combustion?

(SELECT ALL THAT APPLY)

a)

Water

b)

Oxygen

c)

Carbon Dioxide

d)

Heat

e)

Fuel (often incl. carbon bonds)

80.

Which of the following are the reactants in combustion?

(SELECT ALL THAT APPLY)

a)

Water

b)

Oxygen

c)

Carbon Dioxide

d)

Heat

e)

Fuel (often incl. carbon bonds)

81.

What are some facts about carbon?

(SELECT ALL THAT APPLY)

a)

It's in every living thing

b)

It can make four connections

c)

Its bonds hold a lot of energy

d)

It's what makes up fossil fuels

e)

Breaking its bonds releases energy

82.

In a chemical reaction...

(SELECT ALL THAT APPLY)

a)

New elements are made

b)

Elements recombine

c)

Energy can be released

d)

The process can go either forward or backwards

83.

What three things does combustion need?

a)

Fuel, oxygen, water

b)

Fuel, oxygen, heat

c)

Heat, oxygen, fire

84.

When burning a fire, if I remove Oxygen, then the fire will...

a)

no longer burn

b)

keep burning

c)

EXPLODE

85.

True or False: Combustion is needed for cars that run on gasoline to move.

a)

True

b)

False

86.

What are the products of cellular respiration?

a)

Sugar and Oxygen

b)

Carbon Dioxide, Water, and Energy

87.

The sunlight photons mostly...

a)

Came from above and got absorbed into the ground

b)

Came from the ground and escaped into the atmosphere

c)

Went in all different kinds of directions

d)

Bumped into each other

88.

The infrared photons mostly...

a)

Came from above and got absorbed into the ground

b)

Came from the ground and escaped into the atmosphere

c)

Went in all different kinds of directions

d)

Bumped into each other

89.

Which one is true?

a)

Infrared photons bounced off the cloud and the GHGs

b)

Sunlight photons bounced off the cloud and the GHGs

c)

Infrared photons bounced off the cloud and sunlight photons bounced off the GHGs

d)

Sunlight photons bounced off the cloud and infrared photons bounced off the GHGs

90.

In the simulation, the fact that the ground absorbed the sunlight photons and emitted the infrared photons is an...

a)

Inference

b)

Observation

91.

The fact that the sunlight photons got turned into the infrared photons is an...

a)

Inference

b)

Observation

92.

When there were more greenhouse gasses in the air, what happened?

a)

The sunlight photons bounced off of each other more

b)

The infrared photons bounced off of each other more

c)

The sunlight photons bounce off the GHG more

d)

The infrared photons bounce off the GHG more

93.

Photons are...

a)

Another word for protons

b)

Another word for atoms

c)

Another representation of electromagnetic radiation

94.

The more GHG there were, the more the temperature...

a)

increased

b)

decreased

c)

stayed the same

95.

When there are a lot of GHGs what is the reason it's hotter?

a)

The sunlight photons stay low to the ground because of gravity

b)

The infrared photons stay low to the ground because of gravity

c)

The infrared photons stay low to the ground because they keep bumping into the GHGs

d)

The sunlight photons stay low to the ground because they keep bumping into the GHGs

96.

Why are the infrared waves thinner without GHGs?

a)

There is more infrared (heat)

b)

There is less infrared (heat)

c)

There is more light

d)

There is less light

97.

What is the main difference in the wave simulation when you add GHGs?

a)

The waves going back into space get thinner

b)

The waves going back into space get thicker

c)

The waves bounce off of the GHGs and back into the ground

d)

The waves bounce off the photons and back into the ground

98.

What is the relationship between the waves and the photons?

a)

They are two ways to represent the same thing

b)

They both happen at the same time

c)

Sometimes one happens, and sometimes it's the other one

d)

Sunlight is waves and infrared is photons

e)

Infrared is waves and sunlight is photons

99.

In your own words, describe the relationships between greenhouse gasses and temperature, based on the simulation. You may draw an image and label it if that would be helpful.

4 lines
100.

Using any of your 5 senses to describe the world around you.

a)

Observation

b)

Inference

c)

Prediction

d)

Logical Theory

101.

What is an inference? 

(hint: we have been using the word "explanation")

a)

Just a random guess

b)

A prediction or logical conclusions about our observations

c)

The same as an observation

d)

Deciding if an observation is qualitative or quantitative

102.

Which two are explanations or inferences?  

a)

Particles are always moving

b)

Everything is made of particles

c)

The food coloring spread even when not mixed

d)

It took 14 minutes to full spread without mixing

103.

Which of these is an observation?

a)

The dog is 4 years old.

b)

The dog is wearing a hat.

104.

Choose 2 inferences about this picture.

a)

Today is the dog's birthday.

b)

There is a candle on the cake.

c)

The dog has a tag on the collar.

d)

The dog will eat the cake.

105.

Which of the following statements is an inference of the graph?

a)
Tom had $60 in his account in January
b)
More money was in the account in July than October
c)
Tom worked extra hours to earn more money between April and July
d)
The amount of money increased from January to July
106.

The type of variable that is kept the same to make sure it doesn't become a confounding variable

a)
Independent
b)
Dependent
c)

Controlled

107.
The type of variable that you change or manipulate in an experiment.  It is what you are testing.
a)
Independent
b)
Dependent
c)

Controlled

(so that it's not a confounding variable)

108.
The type of variable that responds to the experiment and is what you measure to determine if your hypothesis is true.
a)
Independent
b)
Dependent
c)

Controlled

(so that it's not a confounding variable)

109.

We tested whether the temperature of the water affected the speed of spread of the food coloring. What was the independent variable?

a)

The temperature of the water

b)

The temperature of the food coloring

c)

The speed of the spread

d)

The type of cup

110.

We tested whether the temperature of the water affected the speed of spread of the food coloring. What was the dependent variable?

a)

The temperature of the water

b)

The temperature of the food coloring

c)

The speed of the spread

d)

The type of cup

111.

We tested whether the temperature of the water affected the speed of spread of the food coloring. What could have been a confounding variable?

a)

The temperature of the water

b)

The temperature of the food coloring

c)

The speed of the spread

d)

The type of cup

112.

In conduction, when a faster moving particle bumps into a slower moving particle.... (SELECT ALL THAT APPLY)

a)

The faster moving particle slows down

b)

The slower moving particle speeds up

c)

They both move faster

d)

They both move slower

113.

Put these in order from particles moving the MOST (1) to particles moving the LEAST (3).

a)

gas

b)

liquid

c)

solid

1)
2)
3)
114.

We measured how many drops of alcohol or water fit on a penny. The size of the drops was the...

a)

confounding variable

b)

controlled variable

c)

independent variable

d)

dependent variable

115.
A student wants to test the effects of type of exercise on heart rate.  What is the dependent variable?
a)
heart rate
b)
type of exercise
c)
amount of exercise
d)
time of day exercise occurs
116.

In any experiment, the independent variable ______________.

a)

remains the same to not mess up the experiment

b)

is purposely changed to test the hypothesis

c)

is measured by the scientist during the experiment

117.

In a gas, the particles are ____ than in a liquid.

a)

further apart

b)

closer together

c)

bigger

d)

smaller

118.

In a ____, particles CANNOT move past each other.

a)

solid

b)

liquid

c)

gas

119.

Have a definite shape and a definite volume

a)

Solid

b)

Liquid

c)

Gas

120.

Have a definite volume but no definite shape

a)

Solid

b)

Liquid

c)

Gas

121.

Have no definite volume and no definite shape

a)

Solid

b)

Liquid

c)

Gas

122.

What does this image show?

a)

Solid

b)

Liquid

c)

Gas

123.

What does this image show?

a)

Solid

b)

Liquid

c)

Gas

124.

What does this image show?

a)

Solid

b)

Liquid

c)

Gas

125.

What causes a change in state?

a)

Adding heat

b)

Removing heat

c)

Both adding and removing heat

126.

When a solid changes into a liquid it is called

a)

Melting

b)

Sublimation

c)

Condensation

d)

Freezing

127.

Freezing is when a liquid changes into a _____

a)

Gas

b)

Liquid

c)

Solid

128.

True or False: When you heat a solid or liquid its particles begin to move faster.

a)

True

b)

False

129.

True or False: Air is nothing.

a)

True

b)

False

130.

In real life, which need to be true to see your breath outside? SELECT ALL THAT APPLY!

a)

Your breath must be hot

b)

Your breath must be cold

c)

The air must be hot

d)

The air must be cold

131.

HYPOTHETICALLY: If your breath was very cold (say, you were a ghost) and the outside temperature was very hot and moist (say you were in Hawaii), could you see your breath?

a)

Yes

b)

No

132.

You take a soda can out of the fridge and it has little droplets on it. Where did they come from?

a)

The air

b)

The soda inside the can

c)

The water inside the can

d)

The ice

133.

The ice cube melted faster...

a)

On the plastic

b)

On the aluminum / desk

134.

Ice melts faster on aluminum than plastic because...

a)

The Aluminum particles don't transfer as much energy when they bump into each other

b)

There are more aluminum particles

c)

The plastic particles don't bump into each other as much

d)

The plastic particles don't transfer as much energy when they bump into each other

135.

True or False: Particles in solids do not move.

a)

True

b)

False

136.

The ice cube melted faster...

a)

In the room temperature water

b)

In the room temperature air

137.

The ice cube melted faster in water because...

a)

more particles hit it

b)

the water was hotter

c)

attraction between particles

d)

the particles are bigger

138.

When you heat up a substance, it expands because...

a)

Each particle gets bigger

b)

Heat particles were added

c)

The particles spread out

139.

Which is true?

a)

Less dense things float on more dense things

b)

More dense things float on less dense things

c)

Nothing floats

d)

Density doesn't have to do with floating

140.

When the can got cold from the ice and salt inside of it, it was because

a)

the particles of the ice transferred their coldness to the particles of the can

b)

the particles of the can transferred their heat to the particles of the ice

c)

the particles of the can transferred their energy to the particles of the air

d)

the ice froze onto the can

141.

Which of the following involve particles slowing down? SELECT ALL THAT APPLY

a)

Melting

b)

Freezing

c)

Condensation

d)

Evaporation

142.

What is the main obstacle to evaporation?

a)

Particles attracting each other

b)

Particles repelling each other

c)

Particles condensing

d)

Particles melting

e)

Particles freezing

143.

Condensation is changing from a __ to a __

a)

gas to a liquid

b)

liquid to a gas

c)

solid to liquid

d)

liquid to solid

144.

Water freezes into ice because

a)

the water particles get harder

b)

of the attractions between the particles

c)

ice floats on water

d)

ice sinks in water

145.

Different liquids have different freezing points because

a)

Different types of particles have different amounts of attraction for each other

b)

Freezers are at different temperatures

c)

Some winters are colder than others

d)

The less liquid you use the faster it freezes

146.

In condensation...

a)

particles get closer together

b)

particles get further apart

c)

particles stay the same distance from each other

147.

True or False: In a gas, attraction between particles basically doesn't matter.

a)

True

b)

False

148.

The frost on the outside of the can with ice and salt in it came from...

a)

the can

b)

the ice in the can

c)

the water in the can

d)

the water in the air

149.

What happens faster when the substance is hotter? SELECT ALL THE APPLY

a)

Evaporation

b)

Condensation

c)

Melting

d)

Freezing

150.

What happens faster when the substance is colder? SELECT ALL THAT APPLY

a)

Evaporation

b)

Condensation

c)

Melting

d)

Freezing

151.

In conduction...

a)

faster moving particles give their energy to slower moving particles

b)

slower moving particles give their energy to faster moving particles

c)

faster moving particles get bigger

d)

slower moving particles get bigger

e)

slower moving particles get smaller

152.

In a thermometer, the red line goes up when hot because

a)

the particles get bigger

b)

the particles get further apart

c)

the particles get smaller

d)

the particles get closer together

153.

Water on wax paper was easier to combine than break apart because

a)

water particles attract each other

b)

they weren't

c)

the wax paper particles attracted the water particles

d)

the wax paper particles repelled the water particles

e)

the water particles repel each other

154.

Why does a room temperature desk feel cold?

a)

the particles of the desk are very conductive

b)

the particles of the desk are not very conductive

c)

the particles of the desk are dense

d)

the particles of the desk are not dense

155.

Using any of your 5 senses to describe the world around you.

a)

Observation

b)

Inference

c)

Prediction

d)

Logical Theory

156.

What is an inference? 

(hint: we have been using the word "explanation")

a)
Just a random guess
b)
A prediction or logical conclusions about our observations
c)
The same as an observation
d)

Deciding if an observation is qualitative or quantitative

157.

Which two are inferences?  

(hint: we have been using the word "explanation")

a)

Particles are always moving

b)

Everything is made of particles

c)

The food coloring spread even when not mixed

d)

It took 14 minutes to full spread without mixing

158.

Which of these is an observation?

a)

The dog is 4 years old.

b)

The dog is wearing a hat.

159.

Choose 2 inferences about this picture.

a)

Today is the dog's birthday.

b)

There is a candle on the cake.

c)

The dog has a tag on the collar.

d)

The dog will eat the cake.

160.
The boy is not going to school today
a)
observation
b)
inference
161.
The least amount of students like red juice
a)
observation
b)
inference
162.

Which of the following statements is an inference of the graph?

a)
Tom had $60 in his account in January
b)
More money was in the account in July than October
c)
Tom worked extra hours to earn more money between April and July
d)
The amount of money increased from January to July
163.

Observation or Inference: The cat is scared.

a)

Observation

b)

Inference

164.

The type of variable that is kept the same to make sure it doesn't become a confounding variable

a)
Independent
b)
Dependent
c)

Controlled

165.
The type of variable that you change or manipulate in an experiment.  It is what you are testing.
a)
Independent
b)
Dependent
c)

Controlled

(so that it's not a confounding variable)

166.
The type of variable that responds to the experiment and is what you measure to determine if your hypothesis is true.
a)
Independent
b)
Dependent
c)

Controlled

(so that it's not a confounding variable)

167.

Dory set up an experiment to see how the mass of a ball affects the distance it rolls off a ramp. What is the independent variable?

a)
distance traveled by the ball
b)
height of the ramp
c)
mass of the ball
d)
ball type
168.
Dory set up an experiment to see how the mass of a ball affects the distance it rolls off a ramp. What is the dependent variable?
a)
distance traveled by the ball
b)
height of the ramp
c)
mass of the ball
d)
ball type
169.

When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, three different fertilizers, equal light, and equal water. What type of variable is the fertilizer?

a)

Dependent

b)

Independent

c)

Controlled

(so it's not confounding)

170.

When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the size of the plant?

a)
Dependent
b)
Independent
c)

Controlled

(so it's not confounding)

171.

When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the type of plant?

a)
Dependent
b)
Independent
c)

Controlled

(so it's not confounding)

172.

The vertical axis of a line graph is called the __________.

a)

slope

b)

line of best fit

c)

x-axis

d)

y-axis

173.

The horizontal axis of a line graph is called the __________.

a)

slope

b)

line of best fit

c)

x-axis

d)

y-axis

174.
How many total people took the survey?
a)
50
b)
150
c)
100
d)
200
175.
To find the average of a set of numbers, add up all the items and divide by...
a)
2
b)
The minimum
c)
The maximum
d)
The number of items
176.

What is the interval on the x axis?

a)

1 min

b)

10 min

c)

30 min

d)

1 day

177.

We tested whether the temperature of the water affected the speed of spread of the food coloring. What was the independent variable?

a)

The temperature of the water

b)

The temperature of the food coloring

c)

The speed of the spread

d)

The type of cup

178.

We tested whether the temperature of the water affected the speed of spread of the food coloring. What was the dependent variable?

a)

The temperature of the water

b)

The temperature of the food coloring

c)

The speed of the spread

d)

The type of cup

179.

We tested whether the temperature of the water affected the speed of spread of the food coloring. What could have been a confounding variable?

a)

The temperature of the water

b)

The temperature of the food coloring

c)

The speed of the spread

d)

The type of cup

180.

In conduction, when a faster moving particle bumps into a slower moving particle.... (SELECT ALL THAT APPLY)

a)

The faster moving particle slows down

b)

The slower moving particle speeds up

c)

They both move faster

d)

They both move slower

181.

When you put a HOT spoon into COLD water... (SELECT ALL THAT APPLY)

a)

the spoon cools down

b)

the spoon heats up

c)

the water cools down

d)

the water heats up

182.

Put these in order from particles moving the MOST (1) to particles moving the LEAST (3).

a)

gas

b)

liquid

c)

solid

1)
2)
3)
183.

A scientist investigates the effect of carbon dioxide on plant height. The scientist grows plants in several closed containers. All the plants receive the same amounts of water and light, but the air in each container has a different amount of carbon dioxide. What is the independent variable in this experiment?

a)

the amount of carbon dioxide in each container

b)

the number of plants in each container

c)

the amount of water provided to the plants

d)

the height of each plant after a period of time

184.
A student wants to test the effects of type of exercise on heart rate.  What is the dependent variable?
a)
heart rate
b)
type of exercise
c)
amount of exercise
d)
time of day exercise occurs
185.

In any experiment, the independent variable ______________.

a)

remains the same to not mess up the experiment

b)

is purposely changed to test the hypothesis

c)

is measured by the scientist during the experiment

186.

In a gas, the particles are ____ than in a liquid.

a)

further apart

b)

closer together

c)

bigger

d)

smaller

187.

In a ____, particles CANNOT move past each other.

a)

solid

b)

liquid

c)

gas

188.

What is the interval on the y axis?

a)

10

b)

10 gigatons of CO2

c)

10 years

d)

years

e)

gigatons of CO2

189.

Which area of the world had the most CO2 emissions in 2019?

a)

Africa

b)

Americas

c)

Asia

d)

Europe

e)

Oceania

190.

Which area of the world had the most CO2 emissions in 1970?

a)

Africa

b)

Americas

c)

Asia

d)

Europe

e)

Oceania

191.
What is an atom made up of?
a)
Protons and neutrons
b)
Protons and electrons
c)
Neutrons and electrons
d)
Protons, neutrons, and electrons
192.
What is an element defined by?
a)
Number of electrons
b)
Atomic number
c)
Number of neutrons
d)
Atomic mass
193.
Where are protons and neutrons located in an atom?
a)
In the electron energy levels
b)
In the electron shells
c)
In the electron cloud
d)
In the nucleus
194.
How many electrons can the first energy level hold?
a)
Six
b)
Four
c)
Two
d)
Eight
195.
What is the charge of a proton?
a)
Negative
b)
Variable
c)
Positive
d)
Neutral
196.
What is the mass contribution of a neutron?
a)
2amu
b)
It varies
c)
0amu
d)
1amu
197.
What is the charge of an electron?
a)
Negative
b)
Neutral
c)
Variable
d)
Positive
198.
Do electrons contribute to mass?
a)
No
b)
Sometimes
c)
Yes
d)
Depends on the element
199.
What is the default charge of an element on the periodic table?
a)
Positive
b)
Neutral
c)
Negative
d)
Variable
200.
How is mass computed?
a)
By adding the number of neutrons and the number of electrons
b)
By adding the number of protons and the number of electrons
c)
By adding the number of protons and the number of neutrons
d)
By subtracting the number of protons from the number of electrons
201.

How is charge of an atom or ion computed?

a)

By subtracting the number of protons from the number of electrons

b)

By adding the number of protons and the number of electrons

c)

By adding the number of neutrons and the number of electrons

d)

By subtracting the number of electrons from the number of protons

202.
What is the charge of a neutral atom?
a)
Variable
b)
Zero
c)
Negative
d)
Positive
203.
What are charged atoms called?
a)
Compounds
b)
Molecules
c)
Ions
d)
Isotopes
204.
When is an ion positively charged?
a)
If it has equal numbers of protons and electrons
b)
If it has more electrons than protons
c)
If it has more protons than electrons
d)
If it has no neutrons
205.
When is an ion negatively charged?
a)
If it has more electrons than protons
b)
If it has more protons than electrons
c)
If it has no neutrons
d)
If it has equal numbers of protons and electrons
206.
What are isotopes?
a)
Different versions of an element with different numbers of electrons
b)
Different versions of an element with different numbers of neutrons
c)
Different versions of an element with different atomic numbers
d)
Different versions of an element with different numbers of protons
207.
How is atomic mass impacted by isotopes?
a)
It is determined by subtracting the mass of all isotopes
b)
It is determined by averaging the mass of all isotopes
c)
It is determined by adding the mass of all isotopes
d)
It is not impacted by isotopes
208.
What is the maximum number of electrons that the second energy level can hold?
a)
Four
b)
Two
c)
Eight
d)
Six
209.
What is the charge of a neutron?
a)
-1
b)
1
c)
0
d)
It varies
210.
What is the maximum number of electrons that the third energy level can hold?
a)
Four
b)
Eight
c)
Six
d)
Two
211.
What is the role of the atomic number in defining elements?
a)
It is the number of electrons an element has
b)
It is the total number of particles in an element
c)
It is the number of protons an element has
d)
It is the number of neutrons an element has
212.

What do all atoms want?

a)

Love

b)

A full outer shell

c)

Two electrons in their outer shell

d)

Eight electrons in their outer shell

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