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Grade 7 L3: Energy change and temp and pressure change Q6 2025

Total questions: 136

Worksheet time: 5hrs 3mins

Name
Class
Date
1.

If the energy required to break the bonds is greater than the energy released by making new bonds the reaction is _______.

a)

exothermic

b)

endothermic

2.
Exothermic reactions...
a)
Absorb energy
b)
Release energy
c)
Release Color
d)
Absorb Color
3.

Baking pizza in the oven is an example of an _______ reaction.

a)

endothermic

b)

exothermic

4.

If a chemical reaction is EXOTHERMIC, a thermometer in the beaker with the reaction would show ________ in temperature.

a)

no change

b)

an increase

c)

a decrease

5.

Calcium chloride (CaCl2) reacts with water, and the temperature changes from 18°C to 39°C.


Which statement is correct?

a)

The reaction is a physical change.

b)

The reaction is dangerous.

c)

The reaction is exothermic.

d)

The reaction is endothermic.

6.

During an exothermic reaction, the heat energy _________ as chemical bonds __________ is greater.

a)

released, form

b)

absorbed, break

c)

released, break

d)

absorbed, form

7.

During an endothermic reaction, the heat energy ________ as chemical bonds _______ is greater.

a)

released, form

b)

absorbed, break

c)

released, break

d)

absorbed, form

8.

What tool would you use to detect an endothermic or exothermic reaction?

a)

triple beam balance

b)

ruler

c)

thermometer

d)

graduated cylinder

9.

Heat always moves:

a)

from an area of higher temperature to an area of lower temperature.

b)

from an area of lower temperature to an area of higher temperature.

c)

wherever it wants.

d)

away from areas of cold.

10.

What type of reaction does this picture represent?

a)

endothermic

b)

exothermic

11.

What type of reaction does this picture represent?

a)

endothermic

b)

exothermic

12.

In endothermic reactions, the bonds that contain more energy are in the _________.

a)

reactants

b)

products

c)

reactants and products

13.

Formation of chemical bonds requires energy.

a)

True

b)

False

14.

Energy is required to break the chemical bonds. 

a)

True

b)

False

15.

Forming a chemical bond __________

a)

absorbs energy from the surroundings

b)

releases energy into the surroundings

c)

creates energy that did not previously exist

d)

uses up energy that then no longer exists

16.

Endothermic reactions ______.

a)

release more energy than they absorb

b)

absorb more energy than they release

c)

release and absorb exactly the same amount of energy

d)

can either release more energy than they absorb or absorb more energy than

they release, depending on the reaction

17.

A chemical bond __________energy when it breaks.

a)

increases

b)

decreases

c)

absorbs

d)

releases

18.

Energy is _________ when bonds form.

a)

released

b)

absorbed

c)

destroyed

d)

created

19.

Energy is _________ when bonds break.

a)

absorbed

b)

created

c)

destoryed

d)

released

20.

A chemical reaction in which more energy is absorbed than is released is endothermic

a)

True

b)

False

21.

A change in _____ is a sign of energy being used in a chemical reaction.

a)

temperature (hot or cold)

b)

texture

c)

color

d)

smell/odor

22.
The Law of Conservation of Energy states:
a)
Energy can created or destroyed but not transformed 
b)
Energy cannot be created or destroyed, it can only transformed
c)
Energy can't be created, destroyed or transformed
23.
Potential or kinetic?
Running?
a)
potential
b)
kinetic
24.

Energy can not be created nor destroyed.

a)

Newton's Laws of Motion

b)

Big Bang Theory

c)

The Law of Conservation of Momentum

d)

The Law of Conservation of Energy

25.

What is the image demonstrating?

a)

heating the system causes the particles to push further apart

b)

adding more particles to the system causes the balloon to expand

c)

volume increases as temperature decreases

d)

heat slows the particles allowing the balloon to get bigger

26.

Why is the balloon deflated?

a)

the particles slowed down

b)

the particles got faster

c)

the particles became smaller

d)

the particles escaped the balloon

27.

Thermal contraction is...

a)

a decrease in volume as temperature decreases

b)

an increase in volume as temperature decreases

c)

a decrease in volume as temperature increases

d)

an increase in volume as temperature increases

28.

Which graph shows the relationship between temperature and volume?

a)

Graph A

b)

Graph B

c)

Graph C

d)

Graph D

29.

How does heat flow?

a)

from hotter objects to colder objects

b)

from colder objects to hotter objects

c)

in both directions (hot to cold AND cold to hot)

30.

The amount of force per unit area applied to an object's surface...

a)

pressure

b)

temperature

c)

heat

d)

Star Wars

31.

What is this process called?

a)

vaporization

b)

condensation

c)

evaporation

d)

melting

32.

Vaporization is the change of state from....

a)

liquid to gas

b)

solid to liquid

c)

gas to liquid

d)

liquid to solid

33.

The temperature at which a solid turns into a liquid...

a)

melting point

b)

thermometer data point

c)

melting number

d)

particle accelerator

34.

Which model correctly shows heat flow in a system?

a)

Model A

b)

Model B

c)

Model C

d)

Model D

35.

During freezing, the particles...

a)

slow down and form an organized structure

b)

stop moving and lock in place

c)

slow down and repel each other

d)

randomly connect with each other into a solid

36.

Why is there water on the outside of this cold drink?

a)

water vapor in the air around the glass became a liquid

b)

small water particles went through the glass

c)

pressure from the atmosphere pushed the water out

d)

thermal contraction caused the glass to shrink, spilling the water

37.

What occurs during vaporization (check all that apply):

a)

kinetic energy increases

b)

particles slow down

c)

temperature remains constant

d)

liquid becomes a gas

38.

The temperature at which a gas becomes a liquid is the _____________________ point.

a)

boiling

b)

condensation

c)

melting

d)

freezing

39.

During a hot shower, the warm water vapor fogs up on the cooler mirror when it turns back into water. This is an example of-

a)

freezing

b)

condensation

c)

vaporization

d)

sublimation

40.
Volume and temperature have a ______ proportionality.
a)
direct
b)
inverse
c)
linear
d)
exponential
41.

Which two variables must be held constant for Charles's Law to apply?

a)

pressure & volume

b)

volume & temperature

c)

pressure & amount of gas

d)

volume & amount of gas

42.
If a balloon is cooled what will happen to the volume?
a)
Volume will increase
b)
Volume will decrease
c)
Volume will not change
43.
The relationship of which two variables are compared in Charles’s Law?
a)
pressure & volume
b)
volume & temperature
c)
temperature & pressure
d)
volume & moles (amount of gas)
44.
Volume and temperature have a ______ proportionality.
a)
direct
b)
inverse
c)
linear
d)
exponential
45.

Who formulated the Charle's Law?

a)

Edward Charles

b)

Jacque Charles

c)

Charles Darwin

d)

Robert Charles

46.

In Charle's Law, ___________ should always be constant

a)

Pressure

b)

Temperature

c)

Volume

d)

Mass

47.
The relationship of which two variables are compared in Charles’s Law?
a)
pressure & volume
b)
volume & temperature
c)
temperature & pressure
d)
volume & moles (amount of gas)
48.

What remains constant according to Charles’ Law?

a)

Length

b)

Pressure

c)

Temperature

d)

Volume

49.
The relationship of which two variables are compared in Boyle's Law?
a)
pressure & volume
b)
volume & temperature
c)
temperature & pressure
d)
volume & moles (amount of gas)
50.

In BOYLE'S LAW, when Pressure increases then the Volume must...

a)

Increase

b)

Decrease

51.

In BOYLE'S LAW, what type of relationship do pressure and volume have?

a)

Direct

b)

Inverse

c)

No relationship

52.

Which container will have a lower pressure?

a)

left

b)

right

c)

they both have the same pressure

53.

In CHARLES'S LAW, volume and temperature have a ______ proportionality.

a)

direct

b)

inverse

c)

linear

d)

exponential

54.
If a balloon is cooled what will happen to the volume?
a)
Volume will increase
b)
Volume will decrease
c)
Volume will not change
55.
Gas Laws involve what three terms?
a)
Solid Liquid Gas 
b)
Speed Velocity Acceleration 
c)
Elements Compounds Mixtures 
d)
Pressure Temperature Volume 
56.
Charles' Law States...
a)
As Pressure goes up volume goes down
b)
As Pressure goes up temperature goes up
c)
As Volume goes up temperature goes up 
d)
As Pressure goes down volume goes down 
57.

Hot air balloons work because air volume expands as the air temperature increases, while density decreases.

a)

True

b)

False

58.

When water is cooler than air, the air in swim floats shrinks because of a decrease in temperature of the air inside floats, causing them to sink more than float.

a)

True

b)

False

59.

Tires of untouched vehicles get inflated during freezing winter days while get deflated in hot summer days.

a)

True

b)

False

60.

If you take a balloon out in a snowy day, it inflates. When the same balloon is brought back to a warm room, it deflates.

a)

True

b)

False

61.

Certain breads and cakes get that spongy texture because the carbon dioxide released by yeast reacting with the sugars expand when baked.

a)

True

b)

False

62.

When the temperature of matter increases the particles...

a)

speed up and move closer

b)

speed up and move farther a

c)

slow down and move closer together

d)

slow down and move farther apart

63.

How do gas molecules move? 

a)

In an orderly fashion

b)

in straight line paths

c)

constantly and randomly

d)

in a circular motion

64.

In Charles' Law the pressure remains constant.

a)

True

b)

False

65.

What type of relationship is Charles' Law?

a)

Inverse

b)

Direct

c)

Not enough information

66.

True or False: Gases can be compressed. 

a)

True

b)

False

67.

When Pressure increases then the Volume must...

a)

Increase

b)

Decrease

68.

When Volume increases then Pressure must...

a)

Increase

b)

Decrease

69.

What type of relationship to pressure and volume have?

a)

direct

b)

inverse

c)

no relationship

70.

What does Boyle's law relate to?

a)

Temperature and

b)

Volume and Pressure

c)

Temperature and Pressure

d)

Amount and Volume

71.

What causes pressure?

a)

The walls of the container

b)

The vacuum in the container

c)

The collisions of the particles

d)

Atmospheric pressure acting on the outside walls

72.

 The relationship of which two variables are compared in Boyle's Law?

a)

pressure and volume

b)

volume and temperature

c)

temperature and pressure

d)

amount and volume

73.

TRUE/ FALSE: Science is a continually ongoing process.

a)

True

b)

False

74.

Gas Laws involve what three factors?

a)

solid, liquid, gas

b)

speed, velocity, acceleration

c)

elements, compunds, mixtures

d)

pressure, temperature, volume

75.

Directly proportional means that as one value increases ...

a)

the other stays the same

b)

the other increases as well

c)

the other decreases

d)

the other goes to zero

76.

Inversely proportional means as one value increases the other...

a)

increases

b)

decreases

c)

stays the same

d)

does to zero

77.

The word inverse means.......

a)

the same

b)

opposite

78.

Temperature describes  the ______________ of particles.

a)

volume

b)

mass

c)

motion

d)

conductivity

79.

If the temperature of a gas increase, the pressure... (volume is constant)

a)

decreases

b)

increases

c)

does not change

80.

If a balloon is cooled what will happen to the volume?

a)

Volume will increase

b)

Volume will decrease

c)

Volume will not change

81.

A student inflates a balloon with helium then places it in the freezer. The student should expect

a)

The balloon's volume to increase

b)

The balloons volume to decrease

82.

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

c)

The pressure will remain constant

d)

The pressure will equalize

83.
Which container will have lower pressure?
a)
left
b)
right
c)
they both have the same pressure
84.
Energy cannot be destroyed.
a)
True 
b)
False
85.
Energy can be created.
a)
True
b)
False
86.
This type of system requires interaction with the environment around it
a)
Closed System
b)
Open System
87.
A boiling pot of water on a stove is what type of system
a)
Closed System
b)
Open System
88.

A pressure cooker with a lid on it to keep in the steam is what type of system?

a)

Closed System

b)

Open System

89.

An unopened can of vegetables is an example of which type of system?

a)

Open System

b)

Closed System

c)

Isolated System

d)

Broken System

90.
What are the states of matter?
a)
solid, liquid, and juice
b)
solid and liquid
c)
solid and gas
d)
solid, liquid, and gas
91.

The change of one state of matter to another is called

a)

Osmosis

b)

Phase Change

c)

Matter

d)

Energy

92.

Transition from a liquid to a gas

a)

Condensation

b)

Freezing

c)

Evaporation

d)

Melting

93.

Gas condenses to a liquid

a)

Evaporation

b)

Melting

c)

Freezing

d)

Condensation

94.

What happens to molecules when their kinetic energy increases?

a)

The molecules move slower

b)

The molecules move faster

c)

The molecules get heavier

d)

It depends on the type of molecule

95.

Three containers with the same amount of the same material are shown below. Which container has the substance with the highest amount of energy?

a)

The container on the left

b)

The middle container

c)

The container on the right

d)

All have an equal amount of energy

96.

Three containers with the same amount of the same material are shown below. Which container has the substance with the lowest amount of energy?

a)

The container on the left

b)

The middle container

c)

The container on the right

d)

All have an equal amount of energy

97.

The slower the particles in a substance move,

a)

the colder it is.

b)

the warmer it is.

c)

the more energy it has.

98.

What state of matter?

a)

Solid

b)

Liquid

c)

Gas

d)

Plasma!!!

99.

What state of matter?

a)

Solid

b)

Liquid

c)

Gas

100.
7. All phase changes (changing states) requires energy to be added or taken away.
a)
True
b)
False
101.

TRUE/FALSE: Matter can change from one phase to the other just as water can evaporate.

a)

True

b)

False

102.

Based on this photo, when liquid turning to gas is which of the following down below?

a)

Consensation

b)

Freezing

c)

Evaporation

d)

Melting

103.

In which state of matter are molecules always moving?

a)

Liquid

b)

Solid

c)

Gas

d)

Molecules are ALWAYS moving in all three states!

104.

How are molecules moving in a LIQUID?

a)

Moving in place

b)

Moving around each other

c)

Moving away from each other

d)

Not moving

105.

How are molecules moving in a SOLID?

a)

Moving in place.

b)

Moving around each other.

c)

Moving away from each other.

d)

Not moving at all.

106.

How are molecules moving in a GAS.

a)

Moving in place.

b)

Moving around each other.

c)

Moving away from each other.

d)

Not moving at all.

107.

Water molecules were moving IN PLACE and then after energy was transferred into it they were moving AROUND EACH OTHER. What phase change occured?

a)

Freezing

b)

Melting

c)

Evaporation

d)

Condensation

108.

If you transfer energy INTO a substance, how will the movement of the molecules change?

a)

They will move SLOWER.

b)

They will move FASTER.

c)

They will not change speed.

d)

Not enough information is provided.

109.

If you transfer energy OUT OF a substance, how will the movement of the molecules change?

a)

They will move SLOWER.

b)

They will move FASTER.

c)

They will not change speed.

d)

Not enough information is provided.

110.

If you transfer energy INTO a liquid, which state of matter will it be in?

a)

Solid

b)

Gas

c)

Plasma

d)

Water

111.

If you transfer energy OUT OF a liquid, which state of matter will it be in?

a)

Solid

b)

Gas

c)

Plasma

d)

Water

112.

If you transfer energy into two substances, which will EVAPORATE faster?

a)

The one with WEAK attraction.

b)

The one with STRONG attraction.

c)

Neither will evaporate.

d)

Both will evaporate.

113.

What happens to the speed of the molecules as the temperature increases?

a)

The speed increases.

b)

The speed decreases.

c)

The speed remains the same.

d)

The speed doubles.

114.

What happens to the speed of the molecules as the temperature decreases?

a)

The speed increases.

b)

The speed decreases.

c)

The speed remains the same.

d)

The speed doubles.

115.

The energy that an object has because it is moving

a)

Molecule

b)

Refute

c)

Density

d)

Kinetic Energy

116.
The relationship of which two variables are compared in Charles’s Law?
a)
pressure & volume
b)
volume & temperature
c)
temperature & pressure
d)
volume & moles (amount of gas)
117.

What remains constant according to Charles’ Law?

a)

Length

b)

Pressure

c)

Temperature

d)

Volume

118.

In CHARLES'S LAW, volume and temperature have a ______ proportionality.

a)

direct

b)

inverse

c)

linear

d)

exponential

119.
The relationship of which two variables are compared in Boyle's Law?
a)
pressure & volume
b)
volume & temperature
c)
temperature & pressure
d)
volume & moles (amount of gas)
120.

In BOYLE'S LAW, when Pressure increases then the Volume must...

a)

Increase

b)

Decrease

121.

In BOYLE'S LAW, what type of relationship do pressure and volume have?

a)

Direct

b)

Inverse

c)

No relationship

122.

Which container will have a lower pressure?

a)

left

b)

right

c)

they both have the same pressure

123.

The relationship of which two variables are compared in Boyle's Law?

a)

pressure & volume

b)

volume & temperature

c)

temperature & pressure

d)

volume & moles (amount of gas)

124.

What type of relationship is Charles' Law?

a)

Inverse

b)

Direct

c)

Not enough information

d)

#goals

125.

In CHARLES' LAW, at constant pressure, what happens to temperature of a gas when the volume doubles?

a)

The temperature also doubles.

b)

The temperature decreases to half of its original volume.

c)

The temperature doesn't change.

d)

The temperature quadruples.

126.

Pressure in gases is a measure of:

a)

the number of collisions per second of the particles with the side of the container.

b)

the force of the collisions of the particles with the side of the container.

c)

the amount of space taken up by the particles in the container.

d)

None of the above

127.

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.

128.

The amount of force that is exerted on a balloon by the gas inside the balloon is _____.

a)

temperature

b)

Pressure

c)

volume

d)

heat

129.

As long as the temperature does not change, as the volume _____ the pressure _____.

a)

increases, increases

b)

increases, decreases

c)

decreases, decreases

d)

decreases, stays the same

130.

As the space in a container gets smaller, the _____ decreases.

a)

pressure

b)

temperature

c)

heat

d)

volume

131.

When a liquid freezes, its particles get ____.

a)

become bigger

b)

closer together

c)

farther apart

d)

Nothing change

132.

How would the pressure of the gas in an air tank change if more gas particles are added?

a)

pressure stays the same

b)

pressure increases

c)

pressure decreases

d)

pressure is minimal

133.

One goes up, one goes down is which of the following: PICK TWO

a)

Inverse proportion

b)

Charles' Law

c)

Direct Proportion

d)

Boyles' Law

134.

BOTH goes up, BOTH goes down is which of the following: PICK TWO

a)

Inverse proportion

b)

Charles' Law

c)

Direct Proportion

d)

Boyles' Law

135.
a)
This is an example of Charles's law
b)
This is an example of Boyle's law
136.

What type of relationship to pressure and volume have?

a)

direct

b)

no relationship

c)

inverse

d)

I don't know

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