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Year 7 Science Review

Total questions: 167

Worksheet time: 2hrs 56mins

Name
Class
Date
1.

Science Safety Symbol: Should be used to protect your eyes.

a)

b)

c)

d)

2.

Posion: Do not inhale or get on your skin.

a)

b)

c)

d)

3.

Wash your hands thoroughly when finished.

a)

water

b)

shoes

c)

eye drops

d)

eye wash station

4.

If you get chemicals into your eyes, what should you use.

a)

eye wash station

b)

fire blanket

c)

towel

d)

goggles

5.

What is the first thing you should do in an investigation?

a)

Talk with their friend about the experiment.

b)

Read all the directions for the experiment.

c)

Put on goggles.

d)

Clear workspace.

6.

What should you do if you break or spill something during an investigation?

a)

Tell your lab partner.

b)

Call your mom.

c)

Clean it up yourself.

d)

Tell your teacher immediately.

7.

Should you rearrange the steps of an investigation to make it more fun?

a)

yes, you only got one life!

b)

no, NEVER!!! NEVER!!!!

8.

I can perform an experiment of my own

a)

when I'm sure it is safe to do so

b)

whenever I want to

c)

only with permission from the teacher

d)

never

9.

If you are not sure what to do during a lab or other activity

a)

ask the teacher

b)

change lab partners

c)

guess

d)

just sit quietly and do nothing

10.

What are the states of matter?

a)

solid, liquid, and juice

b)

solid and liquid

c)

solid and gas

d)

solid, liquid, and gas

11.

Which form of matter does not take the shape of its container?

a)

liquid

b)

gas

c)

solid

d)

air

12.

A gas

a)

has a definite shape but no definite volume

b)

has a definite volume but no definite shape

c)

has fast-moving particles

d)

none of the above

13.

At higher temperatures

a)

particles in an object have less energy

b)

particles in an object move faster

c)

a gas contracts

d)

none of the above

14.

Which state of matter has molecules that slide past each other but stay close together?

They do not form a regular pattern.

a)

solid

b)

liquid

c)

gas

d)

semi-solid

15.

In the above diagram, "State of Matter B" is a liquid. This means that it has:

a)

definite shape and volume.

b)

no definite shape or volume.

c)

definite volume, but changing shape.

d)

definite shape, but changing volume.

16.

What is happening when my ice cream changes from a solid to a liquid?

a)

freezing

b)

melting

c)

burning

d)

evaporation

17.

What is happening when my water bottle in the freezer goes from a liquid state to a solid state?

a)

melting

b)

evaporating

c)

freezing

d)

cutting

18.

What happens when my glass of water is sitting in the sun and disappears into a gas?

a)

evaporation

b)

burning

c)

melting

d)

freezing

19.

My glass of ice water is sitting in the sun and has droplets of water on the outside of the glass. What is happening?

a)

condensation

b)

evaporating

c)

melting

d)

freezing

20.
What happens to particles as they heat up?
a)
They slow down
b)
Nothing
c)
They don't move
d)
They speed up
21.

Which of the following is not a state of matter

a)

Ice

b)

Gas

c)

Liquid

d)

Solid

22.
Can Solids be compressed?
a)
No
b)
Yes
c)
Sometimes (it depends what it's made of)
d)
Generally no
23.

What state of matter?

a)

Solid

b)

Liquid

c)

Gas

d)

Plasma!!!

24.

What state of matter?

a)

Solid

b)

Liquid

c)

Gas

25.

What state of matter?

a)

Solid

b)

Liquid

c)

Gas

26.
7. All phase changes (changing states) requires energy to be added or taken away.
a)
True
b)
False
27.
Change from Gas to Solid is called........
a)
Sublimation
b)
Deposition
c)
Fusion
d)
condensation
28.

Change from Liquid to Solid is called ...

a)

fusion

b)

Freezing

c)

sublimation

d)

evaporation

29.

A solid turning into a liquid

a)

Adding thermal enrgy

b)

Removing thermal energy

30.

A liquid turning into a gas.

a)

Adding thermal energy

b)

Removing thermal energy

31.

A gas turning into a liquid.

a)

Adding thermal energy

b)

Removing thermal energy

32.

A solid turning into a gas

a)

Adding thermal energy

b)

Removing thermal energy

33.

During the process of sublimation,

a)

a solid turns directly into a gas

b)

a solid turns into a liquid

c)

a gas turns directly into a solid

d)

a liquid turns into a gas

34.

The freezing point of water is the same as its melting point, which is 0 degrees Celsius.

a)

True

b)

False

35.

When a gas cools to become a liquid it loses thermal energy.

a)

True

b)

False

36.

Diffusion is the natural movement of molecules from:

a)

Areas of low concentration to areas of high concentration

b)

Areas of high concentration to areas of low concentration

c)

Cold to hot environments

d)

Gaseous to liquid environments

37.

What causes diffusion?

a)

The constant, random motion of molecules

b)

Magnetic attraction between atoms

c)

The nuclear forces that hold atoms together

d)

The tendency of atoms to form chemical bonds with one another

38.

An increase in temperature does what to diffusion?

a)

Speeds it up

b)

Slows it down

c)

Nothing

d)

Stops it all together

39.
What happens to particles when they are heated?
a)
They speed up and spread out
b)
They slow down and compress
c)
They stop moving
d)
They move closer together and speed up
40.

If a hairspray can is heated, what can be expected of the pressure of the gas inside the can?

a)

The pressure will increase

b)

The pressure will decrease

41.
In what direction(s) does air exert pressure?
a)

In all directions

b)

In no direction

c)
there is no pressure
42.

We can increase the pressure of a gas by:

a)

Not changing the temperature of the gas

b)

Decreasing the temperature of the gas

c)

Increasing the temperature of the gas

43.

Gas pressure is caused by

a)

Gas molecules colliding with each other and walls of container

b)

Gas molecules not moving

44.
How do gas molecules move? 
a)
in an orderly fashion 
b)
constantly and randomly
c)
in a circular motion
45.
True or False: Gases can be compressed. 
a)
True
b)
False
46.
Which container will have a lower pressure?
a)
left
b)
right
c)
they both have the same pressure
47.
If a balloon is cooled what will happen to the volume?
a)
Volume will increase
b)
Volume will decrease
c)
Volume will not change
48.

The reason gases can be compressed is because:

a)

The particles are very close together.

b)

The particles are merely vibrating.

c)

The particles are unable to move.

d)

The particles are very far apart.

49.

Is this an animal or a plant cell?

a)

Animal

b)

Plant

50.

Which structure contains DNA and controls the activities of the cell?

a)

Cell membrane

b)

Cytoplasm

c)

Mitochondria

d)

Nucleus

51.

What is the role of the cell wall in a plant cell?

a)

Makes the cell firm when it is full of water

b)

Site of photosynthesis

c)

Gives the cell structural support

d)

Controls which substances leave or enter the cell

52.

Identify structure C in the diagram

a)

Cytoplasm

b)

Cell membrane

c)

Cell wall

d)

Chloroplast

53.

What is the role of the chloroplast in the plant cell?

a)

Gives the cell structural support

b)

Site of photosynthesis

c)

Site of chemical reactions

d)

Controls the activities of the cell

54.

Identify structure C in the diagram

a)

Cytoplasm

b)

Cell membrane

c)

Nucleus

d)

Mitochondrion

55.

In which structure does aerobic respiration take place?

a)

Chloroplast

b)

Nucleus

c)

Mitochondrion

d)

Vacuole

56.

Identify structure E in the diagram

a)

Chloroplast

b)

Nucleus

c)

Mitochondrion

d)

Vacuole

57.

Where in the cell do chemical reactions take place?

a)

Cytoplasm

b)

Mitochondria

c)

Chloroplasts

d)

Nucleus

58.

Which structure is made of the sugar cellulose?

a)

Cell membrane

b)

Cell wall

c)

Cytoplasm

d)

Vacuole

59.

Which type of specialized cell carries oxygen from the lungs all over the body?

a)

red blood cells

b)

skin cells

c)

muscle cells

d)

white blood cells (macrophages)

e)

nerve cells (neurons)

60.

What is the function of nerve cells?

a)

They are long and have finger-like projections.

b)

Transport oxygen throughout the body.

c)

Control DNA expression.

d)

Transmit electrical signals to different parts of the body.

61.

Root hair cells easily take in water from soil.

a)

This statement describes a STRUCTURE.

b)

This statement describes a FUNCTION.

62.

What are the features of this cell to help it in its function?

a)

Many hair like structure

b)

Rectangular

c)

Many mitochondria

d)

Nuclues

63.

What is the main function of palisade cells?

a)

To protect the plant from insects

b)

To reflect light and protect against direct sunlight

c)

To capture light for photosynthesis

d)

To provide space for gas exchange

64.

Which among the uni- cellular organisms can perform photosynthesis

a)

Bacteria

b)

Fungi

c)

Euglena

d)

Amoeba

65.

Which part of Euglena helps it to detect sunlight for photosynthesis?

a)

flagellum

b)

eyespot

c)

stigma

d)

nucleolus

66.

Euglena make their food in the...

a)

Flagellum

b)

Chloroplast

c)

Cell Membrane

d)

Eye spot

67.
How does distance affect diffusion?
a)
Shorter the distance the faster the rate
b)
The bigger the distance the faster the rate
c)
It doesn't matter - molecules will always diffuse at the same rate
68.
How does the concentration gradient affect diffusion?
a)
The greater the concentration difference the faster the rate
b)
The smaller the concentration difference the faster the rate
c)
The greater the concentration the slower the rate
69.
Which of these molecules is not likely to enter a cell by diffusion?
a)
A protein
b)
Oxygen
c)
Glucose
d)
Water
70.
What is diffusion?
a)
Actively moving molecules from a low to high concentration
b)
Actively moving water from a low to high concentration
c)
Moving molecules along a concentration gradient until they are evenly spread
71.
How does surface area affect the rate of diffusion?
a)
Greater the surface area the slower the rate 
b)
Greater the surface area the faster the rate
c)
Smaller the surface area the faster the rate
d)
Surface area does not affect diffusion
72.
How does increasing temperature affect the rate of diffusion?
a)
Increases enzyme activity increasing the rate
b)
Gives molecules more energy increasing the rate
c)
Takes energy away from molecules slowing down the rate
d)
Decreases enzyme activity and decreases the rate
73.

A hot drink has...

a)

Kinetic Energy

b)

Heat Energy

c)

Thermal Energy

d)

Nuclear Energy

74.

A cyclist at the top of a hill has...

a)

Kinetic Energy

b)

Chemical Potential Energy

c)

Elastic Potential Energy

d)

Gravitational Potential Energy

75.

Humans get their energy from...

a)

Chemical Potential Energy

b)

Thermal Energy

c)

Kinetic Energy

d)

Nuclear Energy

76.

Energy stored in objects being stretched or squashed...

a)

Elastic Potential Energy

b)

Kinetic Energy

c)

Chemical Energy

d)

Thermal Energy

77.
What type of energy is stored in food and fuel?
a)
Chemical
b)
Thermal
c)
Potential
d)
Calories
78.
When an object is moved to a higher position, what name is given to the energy it then stores?
a)
Gravitational Potential
b)
Elastic
c)
Height
d)
Kinetic
79.

The energy going into an energy transfer is always equal to the energy coming out. True or False?

a)

True

b)

False

80.
Which form of energy is mostly produced in this conversion?
a)
Electrical
b)
Mechanical
c)
Thermal
d)
Sound
81.
"Stored energy" is another way of describing what energy type?
a)
Potential
b)
Electrical
c)
Kinetic
d)
Mechanical
82.
What form of energy is also described as "energy of motion"?
a)
Potential
b)
Mechanical
c)
Kinetic
d)
Electrical
83.
What type of energy transfer is most likely responsible when a plant converts the suns energy into food?
a)
Chemical to Solar
b)
Solar to chemical
c)
Light to electrical
d)
Electrical to chemical
84.

Batteries are an example of which type of energy store?

a)

Thermal

b)

Magnetic

c)

Chemical

d)

Gravitational potential

85.

Which of these four examples are is an example of an energy transfer

a)

Thermal

b)

Elastic

c)

Magnetic

d)

Mechanical

86.

If energy is transferred mechanically the object is being what?

a)

pulled/pushed/stretched/squashed

b)

shoved/pushed/light

c)

sound/heat/pushed

d)

electrically/pushed/sound/light

87.

Conservation of energy means that...

a)

Energy can be destroyed and made before being transferred

b)

Energy can't be made or destroyed it can only transferred from one store to another

c)

Energy can be made and destroyed

d)

Energy can be made and destroyed then transferred from one store to another

88.

What is a calorie?

a)

A unit of measurement for weight

b)

A unit of measurement for energy

c)

A unit of measurement for temperature

d)

A unit of measurement for time

89.

What happens if we consistently consume more energy than we burn?

a)

We will lose weight

b)

We will gain weight

c)

Our body temperature will increase

d)

Our body will become malnourished

90.

What is the main function of calories in our body?

a)

To enable digestion

b)

To fuel physical activity

c)

To support the basic functions of organs and tissues

d)

To raise body temperature

91.

What is the average calorie count of a pizza slice?

a)

78 calories

b)

52 calories

c)

2000 calories

d)

272 calories

92.

What is the basal metabolic rate?

a)

The number of calories needed to survive without eating or moving

b)

The number of calories needed for digestion

c)

The number of calories needed for physical activity

d)

The number of calories needed for basic organ functions

93.

Who requires slightly more calories than usual?

a)

Elderly people

b)

Pregnant women

c)

Athletes

d)

Children

94.

Which type of food takes more energy to digest?

a)

Celery

b)

Potato chips

c)

Bread

d)

Apple

95.

What can happen if you eat too many foods with low nutritional value?

a)

You will gain weight

b)

You will lose weight

c)

You will become malnourished

d)

You will have increased energy levels

96.

......is a bad conductor of heat

a)

copper

b)

iron

c)

plastic

d)

Aluminium

97.

A form of energy that transfers from the higher temperature objects to the lower temperature objects

a)

Temperature

b)

Heat

c)

Thermometer

d)

No correct answer

98.

..........is the degree of hotness or coldness of a body .

a)

Heat

b)

Thermometer

c)

Temperature

d)

No correct answer

99.

Materials that do not conduct heat well are called.........

a)

Conductors

b)

Insulators

100.

Aluminium is used in making .......

a)

Handles of kettles

b)

Cooking pots and kettle

c)

Heavy blankets

101.

The handle of electric iron is made of .......

a)

Iron

b)

Aluminium

c)

Plastic

102.

Heat is used in our daily life in ........

a)

Cooking

b)

Heating water

c)

Warming the house

d)

All of them

103.

Conduction is heat transferring through a .....

a)

Liquid

b)

Solid

c)

Gas

104.

When particles are heated they begin to

a)

Vibrate

b)

Spin

c)

Break down

d)

Science

105.

A hot drink has...

a)

Kinetic Energy

b)

Heat Energy

c)

Thermal Energy

d)

Nuclear Energy

106.

A cyclist at the top of a hill has...

a)

Kinetic Energy

b)

Chemical Potential Energy

c)

Elastic Potential Energy

d)

Gravitational Potential Energy

107.

Humans get their energy from...

a)

Chemical Potential Energy

b)

Thermal Energy

c)

Kinetic Energy

d)

Nuclear Energy

108.

Energy stored in objects being stretched or squashed...

a)

Elastic Potential Energy

b)

Kinetic Energy

c)

Chemical Energy

d)

Thermal Energy

109.
What type of energy is stored in food and fuel?
a)
Chemical
b)
Thermal
c)
Potential
d)
Calories
110.
When an object is moved to a higher position, what name is given to the energy it then stores?
a)
Gravitational Potential
b)
Elastic
c)
Height
d)
Kinetic
111.

The energy going into an energy transfer is always equal to the energy coming out. True or False?

a)

True

b)

False

112.
Which form of energy is mostly produced in this conversion?
a)
Electrical
b)
Mechanical
c)
Thermal
d)
Sound
113.
"Stored energy" is another way of describing what energy type?
a)
Potential
b)
Electrical
c)
Kinetic
d)
Mechanical
114.
What form of energy is also described as "energy of motion"?
a)
Potential
b)
Mechanical
c)
Kinetic
d)
Electrical
115.
What type of energy transfer is most likely responsible when a plant converts the suns energy into food?
a)
Chemical to Solar
b)
Solar to chemical
c)
Light to electrical
d)
Electrical to chemical
116.

Batteries are an example of which type of energy store?

a)

Thermal

b)

Magnetic

c)

Chemical

d)

Gravitational potential

117.

Which of these four examples are is an example of an energy transfer

a)

Thermal

b)

Elastic

c)

Magnetic

d)

Mechanical

118.

If energy is transferred mechanically the object is being what?

a)

pulled/pushed/stretched/squashed

b)

shoved/pushed/light

c)

sound/heat/pushed

d)

electrically/pushed/sound/light

119.

Conservation of energy means that...

a)

Energy can be destroyed and made before being transferred

b)

Energy can't be made or destroyed it can only transferred from one store to another

c)

Energy can be made and destroyed

d)

Energy can be made and destroyed then transferred from one store to another

120.

Near the ceiling of a room the air is warmer. The warm air rises because of

a)

conduction

b)

convection

c)

radiation

121.

In heat transfer, heat always flows from the _______________ substance to the _______________ substance.

a)

Hotter to colder

b)

Colder to hotter

c)

Hotter to hotter

d)

Colder to colder

122.

The handle of a metal spoon warms up when it is placed in a hot bowl of soup because of

a)

Convection

b)

Conduction

c)

Radiation

d)

insulation.

123.

An iron is placed on your clothes to smooth out the wrinkles. The iron transfers heat to your clothes through

a)

conduction

b)

convection

c)

radiation

124.
Warm air rises and the cool air sinks demonstrates this type of heat transfer. 
a)
conduction
b)
convection
c)
radiation
d)
Insolation 
125.
Hot coffee is stirred with a spoon; the spoon gets hot due to
a)
conduction
b)
convection
c)
radiation
126.

In which of the following state are the particles closest together?

a)

Fluid

b)

Gas

c)

Liquid

d)

Solid

127.
Johnny accidentally grabbed the handle of the hot pot.
a)
conduction
b)
convection
c)
radiation
128.

What type of energy transfer occurs when hot water flows through cool water?

a)

insulation

b)

radiation

c)

conduction

d)

convection

129.
Which direction is heat flowing in the picture?
a)
from the hand to the ice
b)
from the ice to the hand
c)
heat is not being transferred
d)
there is no way to tell
130.
What is infrared radiation?
a)
The circulation of a fluid caused by heating it.
b)
Transfer of heat inside a metal.
c)
Heat energy transfer by electromagnetic waves
d)
Transfer of light energy
131.
The hotter an object the more infrared radiation is given off (T/F).
a)
Frue 
b)
False
132.
Which of the following is best at reflecting infrared radiation?
a)
Dark, matt surface
b)
Light, shiny surface
c)
Dark, shiny surface
133.
Which of the following is the best at absorbing infrared radiation?
a)
Dark, matt surface
b)
Light, shiny surface
c)
Dark, shiny surface
134.
Which of the following is the best at emitting infrared radiation?
a)
Dark, matt surface
b)
Light, shiny surface
c)
Dark, shiny surface
135.
Infrared radiation cannot pass through a vacumn (T/F)
a)
True
b)
False
136.
Which temperature probe would record the highest temperature?
a)
A (silver)
b)
B (black)
c)
Both would be the same.
137.
When the bunsen burner is lit which marble will fall off first?
a)
The one on the white surface.
b)
The one on the black surface.
c)
Both will fall off at the same time.
138.
The three cans were all filled with boiling water they were left for ten minutes and then the temperature of the water was measured again. In which can would the water temperature be the lowest?
a)
A
b)
B
c)
C
d)
There would be no difference.
139.

Fossil fuels are being used at a much _________ rate than the rate they form at. As a result, it is predicted that they will run out.

a)

Faster

b)

Slower

140.

Fossil fuels are ___________________ energy resources.

a)

renewable

b)

non-renewable

141.

Which of these energy resources are renewable?(choose 2 answers)

a)

crude oil

b)

wind

c)

solar

d)

coal

142.

What is a non-renewable energy resource?

a)

An energy resource that will eventually run out.

b)

An energy resource that won't run out.

143.

How long does it take to produce fossil fuels?

a)

hundreds of years

b)

thousands of years

c)

millions of years

d)

billions of years

144.

The three types of fossil fuel are natural gas, coal and ...

a)

methane

b)

oil

c)

uranium

d)

wood

145.

In a thermal power station, the place where the fossil fuels are burnt is called the...

a)

generator

b)

turbine

c)

condenser

d)

furnace

146.

What do we call the device which produces electricity in a power station?

a)

turbine

b)

condenser

c)

generator

d)

transformer

147.

What turns the turbine in a thermal power station?

a)

hamsters

b)

water

c)

air

d)

steam

148.

Why are we trying to use fossil fuelled power stations less?

a)

Gases produced are bad for the environment.

b)

It is an expensive way of making electricity.

c)

Fossil fuels are running out.

d)

Fossil Fuelled power stations leave very dangerous waste products for thousands of years.

149.

Nuclear power is...

a)

renewable

b)

non-renewable

150.

Uranium is a fossil fuel.

a)

True

b)

False

151.

Nuclear power stations release carbon dioxide.

a)

True

b)

False

152.

Nuclear fuel is relatively cheap and reliable.

a)

True

b)

False

153.
Which one is NOT a fossil fuel?
a)
Coal
b)
Oil
c)
Biomass
d)
Gas
154.
Which of these is a true statement about nuclear power?
a)
It's waste can destroy habitats and ecosystems.
b)
It doesn't cost a lot of money to build.
c)
It does not produce radioactive waste.
d)
It produces very little amounts of energy.
155.

Thermal Power Stations are reliable.

a)

True

b)

False

156.
Is the amount of energy being transferred over a period of time.
a)
Power
b)
Energy
c)
Seconds
d)
Joules
157.
What is the unit of measurement for power?
a)
Joules
b)
Watts
c)
Voltage
d)
Calories
158.
How much energy does this appliance transfer per second?
a)
240 V
b)
50 Hz
c)
150 W
d)
N533
159.
A microwave has a power rating of 1550 W. How much energy does it transfer per second?
a)
1.550 Joules
b)
15.50 Joules
c)
155.0 Joules
d)
1550 Joules
160.
 Work done = Force x _________
a)
a. distance
b)
b. acceleration
c)
c. velocity
d)
d. speed
161.

A man pushes a car with a force of 20N. He pushes it 5m. How much work is done?

a)

4J

b)

100J

c)

50J

d)

150J

162.

A ball is thrown 25m with a force of 8N. What is the work done?

a)

200J

b)

175J

c)

250J

d)

225J

163.

Work done and (a)   are the same thing.

164.

what is the product of force and displacement?

a)

work

b)

power

c)

energy

165.

what is the unit of work?

a)

Newton

b)

Joule

c)

Watt

d)

meter

166.

A kettle has a power of 2500 W. What's the power in kW?

a)

250 kW

b)

2.5 kW

c)

25 kW

d)

0.25 kW

167.

If a 4 kW oven was on for 2h cooking a joint of beef, how many units (kWh) of electrical energy were used?

a)

8 kWh

b)

4 kWh

c)

2 kWh

d)

0.5 kWh