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Worksheets

Question Bank for Grade 8 Science

Total questions: 214

Worksheet time: 2hrs 25mins

Name
Class
Date
1.

F​ ​ (a)  

G​ ​ (b)  

H ​ (c)  

dotted line ​ (d)  

J​ ​ ​ (e)  

Choose from the below words
crest
amplitude
trough
rest position
wavelength
frequency
period
time and distance
wave height
2.

Which is not an example of an electromagnetic wave?

a)

Radio Wave

b)

Microwave

c)

Light

d)

Sound

3.
Select the correct order of waves on the EMS 
a)
Radio, Micro, Infra, Visible, Ultra, X-ray, Gamma
b)
Gamma, X-ray, Ultra, Vis, Infra, Micro, Radio
c)
Vis, Micro, Infra, Ultra, X-ray, Gamma, Radio
d)
Micro, Radio, Vis, Infra, Ultra, X-ray, Gamma
4.
Which has the LONGEST wavelength and, therefore, the lowest frequency/energy
a)
Gamma Rays
b)
Radio Waves
c)
Visible Light
d)
Infrared rays
5.
Which has the SHORTEST wavelength and, therefore, the highest frequency/most energy
a)
Radio waves
b)
Ultraviolet Rays
c)
Gamma Rays
d)
X-rays
6.

Which color has the longest wavelength?

a)

Red

b)

Orange

c)

Yellow

d)

Blue

7.
7. Which of the following occurs as the frequency of a wave decreases?
a)
A. The wavelength increases
b)
B. The wavelength decreases
c)
C. The wavelength increases and then decreases
d)
D. The wavelength remains the same
8.
9. The frequency of a wave is measured in ____________________.
a)
Hertz
b)
Crest
c)
Trough
d)
Compression
e)
Rarefaction
9.
16. The highest part of a transverse wave is known as a ____________________.
a)
Crest
b)
Trough
c)
Compression
d)
Rarefaction
e)
Medium
10.
Put the visible light colors in order from longest wavelength to shortest wavelength
a)
Violet, Blue, Green, Orange, Yellow, Red
b)
Red, Yellow, Green, Orange, Violet, Blue
c)
Red, Orange, Yellow, Green, Blue, Violet
d)
Blue, Violet, Green, Yellow, Orange, Red
11.
A high-frequency wave has ___________ than a low-frequency wave
a)
a longer wavelength
b)
a shorter wavelength
c)
the same wavelength
d)
a stronger source
12.

Of the visible spectrum, what color has the highest frequency?

a)

Blue

b)

Green

c)

Yellow

d)

Red

e)

Violet

13.

Match the following

a)

opaque

1.

does not allow light to pass

b)

transparent

2.

light passes through; clear image

c)

translucent

3.

light passes through; blurry image

d)

transmit light

4.

light travels through an object

e)

absorb light

5.

energy transfers to the medium light travels in

14.

How do you think the incident and reflected angles compare?

a)

The incident angle is greater than the reflected angle.

b)

The incident angle is less than the reflected angle.

c)

The incident and reflected angles have the same value.

15.
What type of wave behavior is pictured above?
a)
Refraction
b)
Reflection
c)
Absorption
d)
Diffraction
16.
Which of the following represents refraction?
a)
A
b)
B
c)
C
d)
D
17.
Which of the figures represents reflection?
a)
A
b)
B
c)
C
d)
D
18.

How many wavelengths are pictured here?

a)

0.5

b)

1.0

c)

1.5

d)

2.0

19.
What is B?
a)
crest
b)
trough
c)
compression
d)
rarefaction
20.

What type of wave is this? (a)  

Choose from the below words
mechanical
electromagnetic
microwave
infrared light wave
21.

The unit of measurement for Force is a

a)

mass

b)

gram

c)

Newton

d)

pounds

22.
This graph demonstrates an object that is -
a)
Increasing speed
b)
At a constant speed
c)
Decreasing speed
d)
Stationary
23.
a)

Accelerating gradually

b)

Stopping

c)

Slowing down constantly

d)

Speeding up constantly

24.

What is this graph showing?

a)

Gradually slowing down

b)

Gradually speeding up

c)

Constant speed

d)

Stopped

25.

According to the table, what can be said about the velocity and acceleration?

a)

The velocity stays the same so there is no acceleration

b)

The velocity decreases so there is negative acceleration

c)

The velocity increases at a constant rate so acceleration is constant

d)

The velocity changes so there is no acceleration

26.

Given the following information, what can you tell: I was traveling at 0.5 meters per second and traveling south when the deer struck my car.

a)

My acceleration

b)

My feelings about the incident

c)

My speed

d)

My velocity

27.

Displayed above is an acceleration time graph. Select all of the graphs below which match the acceleration displayed.

a)
b)
c)
d)
e)
28.

Given table 2 and table 3, what can be said about the acceleration of the two objects?

a)

The first object initially accelerated the fastest. They both reached 20 mph at the same time.

b)

The first object did not reach as high a speed as the second object.

c)

The second object had a constant rate of acceleration but the first did not.

d)

Both objects had the same rate of acceleration

29.

How will this object move?

a)

It won't move.

b)

It will accelerate to the right.

c)

It will accelerate to the left.

d)

It will accelerate in both directions.

30.

Four hockey pucks with the same mass are sliding across the ice. Which puck would require the most force to stop?

a)

The puck traveling 8 m/s

b)

The puck traveling 4 m/s

c)

The puck traveling 1 m/s

d)

The puck traveling at 0.25 m/s

31.

If the object were moving to the right at a constant velocity of 3 m/s and the forces shown were acting upon it as shown (they are balanced) , what could we say about it's motion?

a)

It will accelerate to the right

b)

it will continue at a constant speed

c)

it will stop

d)

it will move upward

e)

who's to say?

32.

Each of the golf balls has the same mass but a different position on the table. None of them are moving. What do you know about the upward force the table exerts on the golf balls relative to their position on the table?

a)

The table exerts more force on the balls in the center than the ones on the edge.

b)

The table exerts less force on the balls in the center than the ones on the edge.

c)

The table exerts the same force on all the golf balls regardless of postion.

d)

The table doesn't exert any force on the golf balls since they aren't moving.

33.

The illustration shows people pushing farm carts of equal mass. Each person is pushing with an equal force (F) in the direction shown.


How does the acceleration of Cart A compare to the acceleration of Cart B?

a)

It is twice the magnitude (amount of force), but in the opposite direction of cart B’s acceleration.

b)

It is twice the magnitude (amount of force) and in the same direction as cart B’s acceleration.

c)

It is the same magnitude (amount of force), but in the opposite direction of cart B’s acceleration.

d)

It is the same magnitude (amount of force) and in the same direction as cart B’s acceleration.

34.

Which system is in equilibrium?

a)

The book on the table because the net forces are balanced.

b)

The car because it is moving.

c)

The tug of war because one person is pulling harder.

d)

The weightlifter because he is strong.

35.

A bag of potatoes hangs motionless from a hook.


What forces are acting on the bag of potatoes, and what are their relative magnitudes and directions?

a)

The force of gravity on the potatoes and the force of the hook. The force of gravity is larger than the force of the hook. The force of gravity points downward and the force of the hook points upward.

b)

The force of gravity and the force of the bag. The force of gravity is exactly balanced by the force of the bag. The force of gravity points downward and the force from the bag points upward.

c)

The force of gravity is pulling the potatoes and the bag. The force of gravity is directed downward toward the ground. No other forces are acting on the potatoes.

d)

The bag is pulling upward on the potatoes. Because the bag is not moving, no other force is acting on the potatoes.

36.

If the masses of the balls are doubled, while the force remains the same, how will the acceleration change for the balls?

a)

It will double

b)

It will be halved

c)

It will not change

d)

It will change direction

37.

The two cans do not have equal mass. The same force is applied to both cans. Which answer does NOT explain why the red can will go faster than the blue can?

a)

The motion of the can relates to the action of unbalanced forces.

b)

The larger mass requires more force to overcome inertia.

c)

The smaller weight exerts less frictional force.

d)

Acceleration varies directly with the mass of the object.

38.

Which of Newton's Laws explains why you feel like you are floating on a hill or that you are pinned down in the turns of a roller coaster?

a)

First Law because inertia is what makes you feel like you are moving even when you are not.

b)

Second Law because the force the seat applies a net force to you when changes your direction (which is acceleration).

c)

Second Law because there is no force other than gravity acting on you.

d)

Third law because the forces are balanced in opposite directions.

39.

Which is true regarding the amount of force needed to accelerate an object?

a)

The amount of force needed to accelerate an object is always the same.

b)

As mass increases, the amount of force need also increases.

c)

The amount of force needed to accelerate an object is determined by the speed of the object.

d)

The amount of force needed to accelerate an object is NOT determined by the mass of the object.

40.

What do you need to know to determine the motion of an object experiencing unbalanced forces?

a)

Gravity and velocity

b)

Size, shape and color

c)

acceleration, force and mass

d)

force, friction and speed

41.

A graph showing the kinetic energy of a 10 kg object at different speeds is provided. Based on the information in the graph, we can predict that the kinetic energy of the object at 2 m/s would be ...

a)

0 J

b)

5 J

c)

20 J

d)

60 J

42.

Kinetic energy depends on_________ and _________.

a)

speed and mass

b)

speed and height

c)

height and mass

d)

energy and height

43.

Gravitational potential energy is determined by mass, acceleration due to gravity and the (a)   of the object.

44.

Which point has the most potential energy?

a)

G

b)

F

c)

B

d)

A

45.

Which number shows kinetic energy at its maximum?

a)

three

b)

two

c)

four

d)

five

46.

Describe the transformation between gravitational potential energy and kinetic energy in a roller coaster. You can draw and label a diagram or write the answer in words or a combination of the two.

47.

How does a windmill change forms of energy?

a)

Mechanical to electrical

b)

Electrical to mechanical

c)

Mechanical to light

d)

It is unable to change forms

48.

What is the energy transformation of a violin?

a)

Mechanical to thermal

b)

Mechanical to Sound

c)

Sound to Mechanical

d)

Thermal to Sound

49.

What is the energy Transformation of a remote-controlled car?

a)

Chemical to electrical to mechanical

b)

electrical to chemical to mechanical

c)

mechanical to electrical to chemical

d)

Chemical to Mechanical to electrical

50.

Describe an energy transformation of your choice. You can draw and label it or just write it in words.

51.

What type of heat transfer is the following?

Solar panels are used to collect sunlight for energy.

a)

Convection

b)

Conduction

c)

Radiation

d)

None of the above

52.

In the following example, identify the type of heat transfer.

You hold an ice cube in your hand and it begins to melt.

a)

Radiation

b)

Convection

c)

Conduction

53.

Convection occurs in

a)

liquids and gases

b)

solids

c)

none of these

54.

Describe the thermal energy transfer that takes place in a closed system when you make ice cream. In what direction does the heat transfer? What type of thermal energy transfer is this process (conduction, convection or radiation)? You can draw or write the answer or a combination of the two.

55.

In the following example, identify the correct type of heat transfer:

You feel the warmth from the sun on your face.

a)

Convection

b)

Conduction

c)

Radiation

56.

In the following example, identify the type of heat transfer.

You hold an ice cube in your hand and it begins to melt.

a)

Radiation

b)

Convection

c)

Conduction

57.

In the following example, identify the type of heat transfer:

The handle of a pot is hot and burns your hand.

a)

Convection

b)

Conduction

c)

Radiation

58.

Material or substance that transfers heat easily

a)

Conductor

b)

Radiation

c)

Convection

d)

Insulator

59.

Convection occurs in

a)

liquids and gases

b)

solids

c)

none of these

60.

The arrows in the pot represent _____.

a)

convection

b)

conduction 

c)

waves 

d)

radiation 

61.

The total kinetic and potential energy of all particles in an object is called...

a)

mechanical energy

b)

kinetic energy

c)

potential energy

d)

thermal energy

62.

________ is the transfer of energy from one particle of matter to another within an object or between two objects in direct contact

a)

Conduction

b)

Convection

c)

Radiation

63.

__________ is the transfer of energy by electromagnetic waves

a)

Conduction

b)

Convection

c)

Radiation

64.

What type of heat transfer is the following?

Solar panels are used to collect sunlight for energy.

a)

Convection

b)

Conduction

c)

Radiation

d)

None of the above

65.

In this distance vs time graph, which object is moving away from their starting position at a constant speed?

a)

A

b)

B

c)

C

d)

D

e)

E

66.

Which object in the distance vs time graph is accelerating?

a)

A

b)

B

c)

C

d)

D

e)

E

67.

In this distance vs time graph, which of the following are not moving?

a)

A

b)

B

c)

C

d)

D

e)

E

68.

In the distance vs time graph, on average which object is traveling fastest?

a)

A

b)

B

c)

C

d)

D

e)

E

69.

On the distance vs time graph shown, which object is moving on average the slowest?

a)

A

b)

B

c)

C

d)

D

e)

E

70.

In this velocity vs time graph, which objects are maintaining the same speed?

a)

A

b)

B

c)

C

d)

D

e)

E

71.

In the velocity vs time graph shown, which object/s is accelerating the entire length of the graph?

a)

A

b)

B

c)

C

d)

D

e)

E

72.

In the velocity/time graph, which object that is accelerating has the smallest acceleration?

a)

A

b)

B

c)

C

d)

D

e)

E

73.

Which of the following distance vs time graphs show objects moving at the same speed?

a)
b)
c)
d)
74.

Which of the following distance vs time graphs show objects that started at the same position?

a)
b)
c)
d)
75.

In the distance time graph shown, the object is doing what?

(a)  

76.

In the distance vs time graph below, what is Maria doing from 4 to 8 seconds?

a)

Speeding Up

b)

Slowing Down

c)

Not Moving

d)

Changing Direction

77.

In the distance vs time graph below, what is Maria's speed if she's travelled 200 meters at 1 second and 400 meters at 2 seconds?

a)

2 m/s

b)

200 m/s

c)

100 m/s

d)

2000 m/s

78.

In the distance vs time graph below, where is Maria traveling at a faster speed?

a)

0-4 seconds

b)

4-8 seconds

c)

8-10 seconds

79.

Draw a distance vs time graph where the object is changing direction.

80.

Batteries have _________ energy.

a)

mechanical

b)

thermal

c)

chemical

81.

What is the energy Transformation of a remote-controlled car?

a)

Chemical to electrical to mechanical

b)

electrical to chemical to mechanical

c)

mechanical to electrical to chemical

d)

Chemical to Mechanical to electrical

82.

Which is the best example of kinetic energy?

a)

A car sitting on top of a hill

b)

A skateboard on the sidewalk

c)

A wagon rolling down a hill

d)

A powerwheel parked in the yard

83.

How does energy transfer as the ball is bouncing?

a)

Kinetic, Potential, Potential, Kinetic

b)

Potential, Potential, Kinetic, Kinetic

c)

Kinetic, Kinetic, Potential, Potential

d)

Potential, Kinetic, Kinetic, Potential

84.
Which type of energy transformation occurs when a flashlight shines?
a)
chemical → thermal → electrical
b)
chemical → electrical → light
c)
thermal → chemical → light
d)
chemical → electrical → chemical
85.
A lamp that plugs into a wall socket draws energy which flows through a thin wire in the bulb causing it to glow. What energy transformations are taking place?
a)
chemical → light → electrical
b)
mechanical → sound → light
c)
thermal → solar → electrical
d)
electrical → thermal → light
86.
Some students observing a classroom device being used, noticed the below energy transformations. 
Electrical → Mechanical → Sound
Which device were the students most likely observing?
a)
A triple beam balance measuring an object’s mass.
b)
A pencil sharpener plugged into a wall outlet.
c)
A projector displaying a diagram on the screen.
d)
A working flashlight used to light up a dark corner.
87.
Which kind of energy change occurs when a candle is burning?
a)
Chemical to light.
b)
Light to electrical.
c)
Solar to heat.
d)
Chemical to electrical.
88.
A hairdryer converts -- 
a)
electrical energy into chemical
b)
electrical energy into thermal
c)
chemical energy into mechanical
d)
thermal energy into mechanical
89.

Which of the following are types of kinetic energy?

a)

mechanical

electrical

radiant

sound

thermal

b)

mechanical

electrical

radiant

nuclear

thermal

c)

mechanical

electrical

radiant

nuclear

thermal

d)

mechanical

electrical

radiant

sound

90.

The unit of measurement measuring potential and kinetic energy...

a)

Joules

b)

Watts

c)

Matter

d)

Newton

91.

The amount of kinetic energy in an object is determined by...

a)

Mass and Speed

b)

Speed and height

c)

Mass and Height

d)

Speed and Velocity

92.

An objects potential energy will increase with...

a)

Mass and Velocity

b)

Mass and Height

c)

Mass and Speed

d)

Speed and time

93.

The faster an object moves the greater its ____________ energy.

a)

Kinetic

b)

Potential

c)

Electrical

d)

Solar

94.

The ability to do work by applying force is called

a)

work

b)

energy

c)

force

d)

net force

95.

Which number shows kinetic energy at its maximum?

a)

three

b)

two

c)

four

d)

five

96.

Which of the following statements about a skier skiing down a steep slope is true?

a)

His kinetic energy decreases and his potential energy increases

b)

His potential energy decreases and his kinetic energy increases

c)

His chemical energy increases

d)

Both his potential and kinetic energy increases

97.

_______________ is done when a force acts on an object and the object moves in the direction of the force.

a)

Work

b)

Kinetic energy

c)

Watt

d)

Joule

98.

Which letter shows where kinetic energy is at is highest point?

a)

X

b)

Y

c)

W

d)

Z

99.

Where is kinetic energy at its minimum?

a)

Z

b)

W

c)

X

d)

Y

100.

All waves transfer

a)
energy
b)
light 
c)
matter
d)
particles
101.
Which letter(s) represent the trough of the wave?
a)
A
b)
B & D
c)
D
d)
C & G
102.
Which letter(s) represent the crest of the wave?
a)
A
b)
B & D
c)
B & F
d)
F
103.
Which wave in the diagram has the greatest wavelength?
a)
1
b)
2
c)
3
d)
4
104.
Which wave has a greater frequency?
a)
A
b)
B
105.

the substance through which a wave travels

a)

medium

b)

crest

c)

amplitude

d)

trough

106.

waves that need a medium to travel through (ex. sound)

a)

mechanical waves

b)

electromagnetic waves

c)

stadium waves

d)

gravitational waves

107.

waves that do not need a medium to be transferred (ex. light)

a)

mechanical waves

b)

electromagnetic waves

c)

gravitational waves

d)

stadium waves

108.

the part of a longitudinal wave where the particles are crowded together

a)

compression

b)

crest

c)

rarefaction

d)

amplitude

109.

the part of a longitudinal wave where the particles are spread apart

a)

compression

b)

trough

c)

rarefaction

d)

wavelength

110.

The Atomic number is known as the _______

a)

Number of electrons in an atom

b)

Number of Protons in an atom

c)

Number of neutrons in an atom

d)

Number of Protons and electrons in an atom

111.

The number of electrons in an atom is equal to the...

a)

Atomic number

b)

Protons

c)

Atomic Mass

d)

Neutrons

112.

Which element is found in group 2, period 6?

a)

Oxygen (O)

b)

Barium (Ba)

c)

Selenium (Se)

d)

Carbon (C)

113.
Most of the elements on the periodic table are classified as _____.
a)
Metals
b)
Nonmetals
c)
Metalloids
d)
Periods
114.
Which of the following is a good conductor of heat?
a)
Metal
b)
Nonmetal
c)
Metalloid
115.
Most elements will gain or lose electrons so that they end up with _______ valence electrons.
a)
2
b)
6
c)
8
d)
10
116.

What are valence electrons?

a)

The total number of electrons in an atom

b)

The number of electrons in the outermost shell

c)

The number of electrons in the second shell

d)

The number of protons in the outermost shell

117.

what is the valence electrons for phosphorus in group 15?

a)

15

b)

5

c)

3

d)

2

118.

calcium is in group 2 of the periodic table. what is the valence electrons?

a)

12

b)

2

c)

18

d)

0

119.

This is a Bohr Diagram of Aluminum. How many valence electrons does Aluminum have?

a)

3

b)

4

c)

5

120.

This type of heat transfer takes place with direct contact and at least one solid object. Example a burner on a stove heating the bottom of a pot.

a)

convection

b)

radiation

c)

conduction

121.

A radiator puts a warm air out at the top and draws in cooler air at the bottom.

a)

CONVECTION

b)

CONDUCTION

c)

RADIATION

122.

__________is the form of energy that is transferred between objects that are different temperatures.

a)

Thermal (Heat)

b)

Kinetic

c)

Temperature

123.

Heat from a lamp is an example of _____________.

a)

convection

b)

conduction

c)

radiation

d)

reaction

124.

What happens to the speed of the molecules in matter that increases in thermal energy (heats up)?

a)

the molecules become larger

b)

the molecules become smaller

c)

the molecules move faster

d)

the molecules move slower

125.

You pick up a cold plastic water bottle off of the countertop. The countertop underneath the bottle feels colder that the rest of the counter. Which explanation do you think is the best?

a)

The cold has been transferred from the water bottle to the counter

b)

There is no heat energy left in the counter beneath the water bottle

c)

Some heat has been transferred from the counter to the water bottle

d)

The heat beneath the water bottle moves away into other parts of the countertop

126.

If you put a cup of cola in a freezer it turns to ice...why?

a)

the cola absorbs energy from the air in the freezer.

b)

the cola absorbs the coldness form the air in the freezer.

c)

the freezer air absorbs heat from the cola.

d)

the cola neither absorbs nor releases heat

127.

Looking at the picture, Rico claims that radiation is the type of heat transfer that is happening because

a)

Radiation involves thermal energy transfer via electromagnetic waves which the lamp emits

b)

Radiation involves the transfer of thermal energy via direct contact or touch.

c)

Radiation involves the transfer of thermal energy via differences in fluid densities

128.

a material that reduces the rate of movement of thermal energy

a)

insulator

b)

conductor

c)

radiation

d)

thermal energy

129.

transfer of thermal energy in electromagnetic waves

a)

radiation

b)

conduction

c)

convection

d)

thermal energy

130.
These are found on the Periodic Table.
a)
Compounds
b)
Elements
c)
Mixtures
131.

The letter, C, is a ... of carbon.

a)

Name

b)

Nickname

c)

Chemical Symbol

d)

Pseudonym

132.
What does the 1.00794 stand for?
a)
Hydrogen
b)
atomic number
c)
atomic mass
d)
atomic explosion
133.
The number in the upper corner of an element tile (7 for nitrogen) is called _____
a)
the proton number
b)
the atomic number
c)
the electron number
d)
the mass number
134.
For a given element, the atomic number indicates the number of _____
a)
protons in the nucleus
b)
neutron in the nucleus
c)
electrons in the atom
d)
nucleons in the atom
135.
How many Protons+Neutrons are in one atom of Lithium?
a)
6.941
b)
7
c)
3
d)
6
136.
How many Neutrons are in one atom of Lithium?
a)
6.941
b)
7
c)
3
d)
4
137.
How many Protons are in one atom of Lithium?
a)
3
b)
6
c)
7
d)
6.941
138.
How many protons are in this element?
a)
79
b)
196
c)
117
d)
Cannot be determined
139.

How many protons and electrons does nickel have?

a)

28

b)

58.69

140.
all matter is made of what 
a)
energy 
b)
atoms 
c)
electrons 
d)
compounds 
141.
the central region of an atom where its neutrons and protons are is its 
a)
nucleus 
b)
electron cloud
c)
core 
d)
center 
142.

The negatively charged particles in an atom

a)

Proton

b)

Electron

c)

Neutron

d)

Electron Cloud

143.
Which two particles make up the nucleus of an atom?
a)
Protons and Electrons
b)
Protons and Neutrons
c)
Molecules and Compounds
d)
Neutrons and Electrons
144.

Letter A is showing

a)

Neutrons

b)

Electrons

c)

Protons

d)

Nucleus

145.

Which subatomic particles make up almost all of the mass of an atom?

a)

protons only

b)

protons and neutrons

c)

protons, neutrons and electrons

d)

protons and electrons

146.

The particles in the nucleus of an atom that do not have a charge (neutral)

a)

Proton

b)

Electron

c)

Neutron

d)

Ion

147.

Which subatomic particle has No charge?

a)

Protons

b)

Ions

c)

Electrons

d)

Neutrons

148.
What number indicates the nucleus?
a)
1
b)
2
c)
3
d)
4
149.

Where do the electrons hangout?

a)

Electron Cloud

b)

Nucleus

c)

Atom Cloud

150.

If 20g of sugar is stirred into a beaker containing 100g of water. What would the mass of the dissolved solution be after the sugar is dissolved fully?

a)

20g

b)

100g

c)

80g

d)

120g

151.

Suppose you have 15g of baking soda and mix it with 15g of vinegar. When they are combined they bubble and fizz a lot. The final solution has a mass of 25g. What happened to the "lost" 5g?

a)

it dissappears

b)

it is still there just not weighted

c)

it is in the gas that is formed

d)

nothing happened

152.

a different way to say Law of Conservation of Matter

a)

Law of Conservation of Volume

b)

Law of Conservation of Energy

c)

Law of Conservation of Mass

d)

Law of Conservation of Environment

153.

two or more atoms joined together (can be from the same element or different elements)

a)

molecule

b)

compound

c)

mixture

d)

solution

154.

a substance that forms in a chemical reaction

a)

coefficient

b)

subscript

c)

reactant

d)

product

155.

Physical or chemical change: Folding paper

a)

Physical

b)

Chemical

156.

Which section represents the reactants?

a)

A

b)

B

c)

C

157.

Based on the Law of Conservation of Matter, describe the relationship between the mass of the reactants and the mass of the products.

a)

The mass of the products is always greater than the mass of the reactants.

b)

The mass of the reactants is less than the mass of the products.

c)

The mass of the reactants equals the mass of the products.

d)

The mass of the reactants is greater than the mass of the products.

158.

What are the starting materials in a reaction?

a)

product

b)

subscript

c)

coefficient

d)

reactants

159.

What happens to atoms in a chemical reaction?

a)

they are destroyed

b)

they are created

c)

they are rearranged

160.

Which model represents how matter behaves in the state of gas.

a)
b)
c)
161.

Complete this sentece: "Matter is anything that ...

a)

the amount of matter in an object".

b)

you can smell".

c)

takes up space and has mass".

d)

changes into liquid".

162.

Chemical or Physical:

A characteristic of matter that can be observed with your 5 senses is a ____________ property.

a)

Chemical

b)

Physical

163.

Chemical or Physical:

A characteristic of matter that can only be observed when matter is changed into a new kind of matter.

a)

Chemical

b)

Physical

164.
Blue Color: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
165.
Density: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
166.
Flammability (burns): Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
167.
Solubility (dissolves): Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
168.
Reacts with Acid: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
169.
Melting Point: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
170.

Which of the following objects will experience an unbalanced force?

a)

A bike rider on a smooth and level road, pedaling at a constant rate

b)

A chair sitting on the floor with balanced forces acting in opposite directions

c)

A train pulling another train, each with the same amount of force

d)

A ball rolling across the floor with friction acting in the opposite direction

171.

Why does a book on a table not move?

a)

No forces are acting on the book

b)

Forces of the table pushing up and gravity pulling down are balanced

c)

Gravity is the only force acting on the book

172.

Are forces balanced or unbalanced when a car is moving at a constant speed in a straight line?

a)

Balanced

b)

Unbalanced

173.

Are forces balanced or unbalanced when a marble rolls down a ramp?

a)

Balanced

b)

Unbalanced

174.

Are forces balanced or unbalanced when skateboarding down a ramp?

a)

Balanced

b)

Unbalanced

175.

Balanced forces can cause--

a)

an object to speed up or slow down

b)

an object to stay still or move at a constant speed and direction

c)

an object to stop

176.

Calculate the Net Force

a)

0 N

b)

7 N Right

c)

28 N Right

d)

I don't know

177.

Calculate the Net Force

a)

2 N Right

b)

12 N Right

c)

2 N Left

d)

I don't know

178.
What is the net force?
a)
20 N 
b)
0 N 
c)
400 N 
d)
40 N 
179.
In a tug of war the left team pulls with a force of 200N. The right team pulls with a force of 150N.What is the resultant force?
a)
50N to the left.
b)
350N to the left.
c)
350N to the right.
d)
50N to the right.
180.
The electrical force between charges is strongest when the charges are
a)
close together
b)
far apart
c)
 the electric force is constant everywhere.
d)
there is no pattern
181.

If two charges attract to each other, then which of the following is true?

a)

Both charges must be positive.

b)

Both charges must be negative

c)

Both charges must be different.

d)

Both charges must be equal in value.

182.
When two objects have opposite charge (+ and -), they are:
a)
Attracted to each other
b)
Repelled by each other
c)
Have no effect on each other
183.

Based on the arrangement of the electric field lines in the diagram, what are the charges?

a)

both charges are the same

b)

the charges are opposite

c)

they are neutral; no charge

184.
What happens when two north poles of a magnet are placed together?
a)
they repel
b)
they attract
c)
they cancel each other out
d)
the strength of the magnet is doubled
185.

The area of magnetic force around a magnet is known as its _____________.

a)

magnetic field

b)

magnetic declination

c)

magnetic fan lines

d)

magnetic tan lines

186.
What is the difference between a conductor and an insulator?
a)
An insulator allows electricity to flow through it easily and a conductor does not
b)
A conductor allows electricity to flow through it easily and an insulator does not.
c)
An insulator is magnetic and a conductor is not
d)
A conductor is magnetic and an insulator is not
187.
All of the following are conductors except _______.
a)
metal spoon
b)
wire
c)
iron nail
d)
plastic spoon
188.
The plastic covering is there to:
a)
Provide a conductor for electrical energy to flow.
b)
Provide an insulator so that electrical energy will not pass outside of the wires.
c)
Provide a conductor so that electrical energy can NOT flow.
d)
Provide an insulator so that electrical energy can flow.
189.

Walking across a carpet is an example of charge being transferred by

a)

friction.

b)

induction.

c)

contact.

190.

A method used to charge an object without actually touching the object to any other charged object.

a)

Induction

b)

Conduction

c)

Friction

d)

Grounding

191.

A negatively charged material has ___________ electrons.

a)

gained

b)

lost

192.

A positively charged material has __________ electrons

a)

lost

b)

gained

193.

The contact of a charged object to a neutral object

a)

Conduction

b)

Induction

c)

Friction

d)

Grounding

194.

What would happen if the t-shirt and the balloon were brought close together?

a)

They would attract

b)

They would repel

195.

It is the transfer of electron from a charged object to another by DIRECT CONTACT .

a)

Induction

b)

Conduction

c)

Friction

196.

What causes the magnetic field to form in an electromagnet?

a)

Electromagnets are only called magnets because electricity is involved.

b)

The domains of the magnet become aligned

c)

The magnetic field is absorbed from another magnet

d)

Electric current flowing in a wire

197.

How can you increase the strength of an electromagnet?

a)

By moving the iron core to create friction.

b)

By adding more coils around the iron core.

c)

By decreasing the amount of current in the wire.

d)

By heating up the electromagnet.

198.

An electromagnet can be strengthened if

a)

less coils are added to the iron core

b)

the iron core is removed

c)

more current runs through the wire

d)

a nickel or cobalt iron core is used.

199.

What component becomes a temporary magnet when electricity is flowing through the circuit?

a)

iron nail

b)

copper wire

c)

battery

d)

switch

200.

Which of these is an element?

a)

Salt (NaCl)

b)

Water (H20)

c)

Oxygen (O)

d)

Carbon Dioxide (CO2)

201.

Which of these is a compound?

a)

Aluminium (Al)

b)

Carbon Dioxide (CO2)

c)

Nitrogen (N)

d)

Sand

202.

Which of these is a mixture?

a)

Laundry Detergent

b)

Salt (NaCl)

c)

Oxygen (O)

d)

Fluorine (Fl)

203.
What is an example of a mixture?
a)
iron
b)
ice
c)
soil
d)
gold
204.

Which of the following is classified as a pure substance?

a)

Lemonade

b)

Fruit punch

c)

ketchup

d)

Helium

205.

___________ are the smallest unit of an element that maintains the properties of that element.

a)

Atoms

b)

Elements

c)

Compounds

d)

Mixtures

206.

True or False: elements AND compounds are pure substances.

a)

True

b)

False

207.
a)

Pure Substance

b)

Mixture

208.

Which of the following is NOT a mixture?

a)

milk

b)

lemonade

c)

vegetable salad

d)

aluminum

209.

A ______________ mixture is one that does not have a uniform composition.

a)

heterogeneous

b)

homogenous

c)

pure substance

210.

A _________________ mixture is one where the substances are evenly spread throughout.

a)

heterogeneous

b)

homogeneous

c)

pure substance

211.

In which mixture can you see all of the parts?

a)

homogeneous

b)

heterogeneous

212.

In which mixture can you not see all of the parts?

a)

homogeneous

b)

heterogeneous

213.

A salad is an example of a __________.

a)

homogenous mixture

b)

solution

c)

heterogeneous mixture

d)

homogenous solution

214.
What are the two types of Mixtures
a)
Elements and Subatomic Particles
b)
Protons and Electrons
c)
Atoms and Compounds
d)
Homogenous and Heterogeneous

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