Changes of State: Interactive Quizzes for Year 6 Science

Question 1

Which of the following is a physical change of state?

Accepted Answer

Melting ice

Answer

Burning a piece of paper

Answer

Rust forming on iron

Answer

Dissolving sugar in water

Question 2

When a solid turns into a liquid, what is this change called?

Accepted Answer

Melting

Answer

Freezing

Answer

Evaporation

Answer

Condensation

Question 3

Which factor does NOT affect the melting point of a substance?

Accepted Answer

Volume

Answer

Temperature

Answer

Pressure

Answer

Impurities

Question 4

The process by which a liquid turns into a gas is called:

Accepted Answer

Evaporation

Answer

Sublimation

Answer

Condensation

Answer

Freezing

Question 5

Which of the following is an example of condensation?

Accepted Answer

Fog forming on a cold window

Answer

Water boiling in a kettle

Answer

Ice melting in a glass

Answer

Steam rising from a hot cup of tea

Question 6

What is the term for the temperature at which a substance changes from a liquid to a gas?

Accepted Answer

Boiling point

Answer

Freezing point

Answer

Melting point

Answer

Evaporation point

Question 7

The process by which a gas turns directly into a solid is called:

Accepted Answer

Sublimation

Answer

Melting

Answer

Freezing

Answer

Evaporation

Question 8

Which of the following is a real-world application of evaporation?

Accepted Answer

Drying clothes on a washing line

Answer

Cooling drinks in a refrigerator

Answer

Making ice cream

Answer

Freezing food

Question 9

What is the name of the energy that is absorbed or released during a change of state?

Accepted Answer

Thermal energy

Answer

Kinetic energy

Answer

Potential energy

Answer

Electrical energy

Question 10

What is the name of the change of state from a solid to a liquid?

Accepted Answer

Melting

Answer

Freezing

Answer

Evaporation

Answer

Condensation

Question 11

When water turns from a liquid into a gas, what is this process called?

Accepted Answer

Evaporation

Answer

Condensation

Answer

Melting

Answer

Freezing

Question 12

What happens to the particles in a substance when it changes from a solid to a liquid?

Accepted Answer

They move further apart and speed up

Answer

They move closer together and slow down

Answer

They stay the same distance apart and speed up

Answer

They stay the same distance apart and slow down

Question 13

Which of these is an example of condensation in the real world?

Accepted Answer

The formation of clouds

Answer

The melting of ice

Answer

The boiling of water

Answer

The freezing of water

Question 14

What is the opposite process to evaporation called?

Accepted Answer

Condensation

Answer

Melting

Answer

Freezing

Answer

Sublimation

Question 15

Which of these changes of state involves heat being taken away?

Accepted Answer

Freezing

Answer

Melting

Answer

Evaporation

Answer

Condensation

Question 16

At a temperature of -10°C, water is in which state?

Accepted Answer

Solid

Answer

Liquid

Answer

Gas

Answer

Plasma

Question 17

When a solid turns into a liquid, it is called:

Accepted Answer

Melting

Answer

Freezing

Answer

Evaporation

Answer

Condensation

Question 18

What physical change occurs when water vapour turns into liquid water?

Accepted Answer

Condensation

Answer

Melting

Answer

Freezing

Answer

Evaporation

Question 19

Which of the following is a real-world example of condensation?

Accepted Answer

Water droplets forming on a cold glass

Answer

Ice melting in a warm room

Answer

Steam rising from a kettle

Answer

A puddle evaporating in the sun

Question 20

When a liquid turns into a gas, it is called:

Accepted Answer

Evaporation

Answer

Melting

Answer

Freezing

Answer

Condensation

Question 21

When a gas turns into a liquid, it is called:

Accepted Answer

Condensation

Answer

Melting

Answer

Freezing

Answer

Evaporation

Question 22

Which of the following is a real-world example of sublimation?

Accepted Answer

Dry ice turning into a gas

Answer

Water evaporating from a puddle

Answer

Ice melting in a glass

Answer

Snowflakes forming in the sky

Question 23

Which of the following is a characteristic of a liquid?

Accepted Answer

It takes the shape of its container but has a definite volume.

Answer

It has a definite shape and volume.

Answer

Its particles are closely packed together.

Answer

Its particles are spread far apart.

Question 24

When a solid turns into a liquid, this is called:

Accepted Answer

Melting

Answer

Evaporation

Answer

Condensation

Answer

Freezing

Question 25

When water vapour in the air turns into liquid water, this is called:

Accepted Answer

Condensation

Answer

Evaporation

Answer

Melting

Answer

Freezing

Question 26

Which of the following is an example of condensation in the real world?

Accepted Answer

Fog

Answer

Rain

Answer

Snow

Answer

Ice

Question 27

What happens to the particles in a substance when it melts?

Accepted Answer

They move further apart.

Answer

They move closer together.

Answer

They change shape.

Answer

They change size.

Question 28

What is the boiling point of water at sea level?

Accepted Answer

100°C

Answer

0°C

Answer

212°C

Answer

373°C

Question 29

When a gas turns into a liquid, this is called:

Accepted Answer

Condensation

Answer

Evaporation

Answer

Melting

Answer

Freezing

Question 30

What is the process called when a solid turns into a liquid?

Accepted Answer

Melting

Answer

Evaporation

Answer

Freezing

Answer

Condensation

Question 31

When water changes from a liquid to a solid, what is this process called?

Accepted Answer

Freezing

Answer

Melting

Answer

Evaporation

Answer

Condensation

Question 32

Which of these factors does NOT affect how quickly liquid turns into a gas (evaporates)?

Accepted Answer

Volume of the water

Answer

Temperature

Answer

Size of the water surface

Answer

Air pressure

Question 33

What is the name of the process where water vapor in the air turns into liquid water?

Accepted Answer

Condensation

Answer

Melting

Answer

Evaporation

Answer

Freezing

Question 34

Which of the following is an example of condensation in everyday life?

Accepted Answer

Water droplets forming on a cold glass

Answer

Ice melting in a cup

Answer

Steam rising from a hot drink

Answer

Water boiling in a pot

Question 35

What happens to the particles in a substance when it changes from a solid to a liquid?

Accepted Answer

They move more freely.

Answer

They become more closely packed.

Answer

They decrease in size.

Answer

Their shape stays the same.

Question 36

Which of the following is an example of a physical change?

Accepted Answer

Melting chocolate

Answer

Burning wood

Answer

Rusting metal

Answer

Digesting food

Question 37

What is the energy change called when a substance changes from a solid to a gas?

Accepted Answer

Endothermic

Answer

Exothermic

Answer

Isothermic

Answer

Adiabatic

Question 38

Which of these is NOT a physical change of state?

Accepted Answer

Burning

Answer

Melting

Answer

Freezing

Answer

Evaporation

Question 39

When a solid turns into a liquid, what is the process called?

Accepted Answer

Melting

Answer

Condensation

Answer

Evaporation

Answer

Sublimation

Question 40

What happens when the temperature of a substance falls below its freezing point?

Accepted Answer

It freezes

Answer

It melts

Answer

It boils

Answer

It sublimates

Question 41

Which of these is an example of condensation?

Accepted Answer

Water droplets forming on a cold window

Answer

Ice cubes melting in a glass

Answer

Water boiling in a kettle

Answer

Steam rising from a pot

Question 42

When water turns into a gas, what is the gas called?

Accepted Answer

Water vapour

Answer

Hydrogen

Answer

Oxygen

Answer

Nitrogen

Question 43

Which change of state needs heat energy to happen?

Accepted Answer

Melting

Answer

Freezing

Answer

Condensation

Answer

Sublimation

Question 44

What is the process called when a solid directly turns into a gas?

Accepted Answer

Sublimation

Answer

Melting

Answer

Freezing

Answer

Condensation

Question 45

Which of these real-world examples shows evaporation?

Accepted Answer

Steam rising from a cup of tea

Answer

Rain falling from clouds

Answer

Ice melting in a puddle

Answer

Water droplets forming on a bathroom mirror

Question 46

How can we stop water from evaporating from a swimming pool?

Accepted Answer

Covering the pool with a tarp

Answer

Adding chemicals to the water

Answer

Increasing the surface area of the water

Answer

Lowering the temperature of the water

Question 47

Which of the following is not a physical change of state?

Accepted Answer

Burning

Answer

Evaporation

Answer

Melting

Answer

Freezing

Question 48

When a substance melts, what happens to the particles in it?

Accepted Answer

They move faster and become more spread out.

Answer

They become smaller.

Answer

They remain the same.

Answer

They move slower and become closer together.

Question 49

Why does a cold glass of water have water droplets on the outside?

Accepted Answer

Water vapor in the air condenses when it comes into contact with the cold glass.

Answer

The glass absorbs water from the air.

Answer

Water in the glass evaporates and condenses on the outside.

Question 50

What is the temperature at which water freezes?

Accepted Answer

0°C

Answer

373°C

Answer

100°C

Answer

273°C

Question 51

Which change of state releases heat?

Accepted Answer

Condensation

Answer

Freezing

Answer

Melting

Answer

Evaporation

Question 52

What is the process called when a solid turns directly into a gas?

Accepted Answer

Sublimation

Answer

Deposition

Answer

Evaporation

Answer

Condensation

Question 53

What is the temperature at which water boils?

Accepted Answer

100°C

Answer

0°C

Answer

273°C

Answer

373°C

Question 54

What is a characteristic of gases?

Accepted Answer

They can expand to fill the shape and volume of their container.

Answer

They are hard and have a fixed shape.

Answer

They are more dense than liquids.

Answer

They sink to the bottom of a container.