Investigating Changes in Materials: A Comprehensive Guide for Year 2 Science

Question 1

Which of these changes is a chemical change, where a new substance is made?

Accepted Answer

Burning a candle

Accepted Answer

Rusting iron

Answer

Melting ice

Answer

Dissolving sugar in water

Question 2

Which of these changes is a physical change, where the material stays the same and does not become a new material?

Accepted Answer

Melting ice

Answer

Burning paper

Answer

Rusting iron

Question 3

What happens to ice when it gets warmer?

Accepted Answer

It melts into water.

Answer

It turns into a gas.

Answer

It changes color.

Answer

Nothing happens.

Question 4

When you mix a solid like salt with a liquid like water, what do you think will happen?

Accepted Answer

The salt will dissolve in the water and become invisible.

Answer

The salt will vanish completely.

Answer

The water will become solid.

Answer

The salt will float on the water's surface.

Question 5

When you leave a cold glass of water in a warm room, what happens to the water?

Accepted Answer

It gets warmer.

Answer

It gets colder.

Answer

It stays the same temperature.

Answer

It evaporates.

Question 6

Which of these is a liquid?

Accepted Answer

Water

Answer

Wood

Answer

Iron

Answer

Plastic

Question 7

When water turns into steam, what is the process called?

Accepted Answer

Evaporation

Answer

Melting

Answer

Condensation

Answer

Freezing

Question 8

When steam turns back into water, what is the process called?

Accepted Answer

Condensation

Answer

Melting

Answer

Evaporation

Answer

Freezing

Question 9

Which of these is a natural material?

Accepted Answer

Wood

Answer

Plastic

Answer

Metal

Answer

Glass

Question 10

When ice melts, what is the process called?

Accepted Answer

Melting

Answer

Evaporation

Answer

Condensation

Answer

Freezing

Question 11

What material can be bent easily without breaking?

Accepted Answer

Plastic

Answer

Iron

Answer

Wood

Question 12

What happens to water when it is very cold, like in a freezer?

Accepted Answer

It turns into a solid

Answer

It turns into a gas

Answer

It turns into a liquid

Question 13

When you mix salt and water together, what do you get?

Accepted Answer

A mixture

Answer

A new material

Answer

Nothing, they don't mix

Question 14

When you bake a cake, what makes it rise and become fluffy?

Accepted Answer

Baking powder

Answer

Flour

Answer

Sugar

Question 15

What kind of material is attracted to magnets?

Accepted Answer

Iron

Answer

Plastic

Answer

Wood

Question 16

What happens to sugar when you stir it into your tea?

Accepted Answer

It mixes evenly

Answer

It disappears

Answer

It floats on top

Question 17

What is used to make windows that let light through?

Accepted Answer

Glass

Answer

Brick

Answer

Metal

Question 18

What is the job of a filter in a science experiment?

Accepted Answer

To separate solids from liquids

Answer

To change the colour of liquids

Answer

To heat liquids

Question 19

Which of these materials can conduct electricity?

Accepted Answer

Metal

Answer

Plastic

Answer

Rubber

Question 20

When you heat a chocolate bar, what will happen?

Accepted Answer

It will melt.

Answer

It will become harder.

Answer

It will vanish.

Answer

Nothing will happen.

Question 21

Which of these is an example of a solid?

Accepted Answer

Ice

Answer

Water

Answer

Air

Answer

Smoke

Question 22

What will happen if you combine flour and water?

Accepted Answer

It will form dough.

Answer

It will become a solid.

Answer

It will change into a gas.

Answer

Nothing will happen.

Question 23

What happens when ice melts?

Accepted Answer

It becomes liquid.

Answer

It turns into a gas.

Answer

It stays solid.

Answer

Nothing happens.

Question 24

Which of these materials can attract magnets?

Accepted Answer

Iron

Answer

Plastic

Answer

Wood

Answer

Paper

Question 25

What happens when you boil water?

Accepted Answer

It turns into gas.

Answer

It becomes solid.

Answer

It stays liquid.

Answer

Nothing happens.

Question 26

Which change happens when a solid becomes a liquid? Does it need to be heated or cooled?

Accepted Answer

It changes when heated

Answer

It changes when cooled

Question 27

Which method cannot be used to separate sand and salt? Is it using a filter, a magnet or sifting?

Accepted Answer

Magnet

Answer

Filter

Answer

Sift

Question 28

What is the name of the change when a solid changes directly to a gas without becoming a liquid first?

Accepted Answer

Sublimation

Answer

Melting

Question 29

Which material can conduct heat well? Is it wood, plastic, metal or fabric?

Accepted Answer

Metal

Answer

Wood

Answer

Plastic

Answer

Fabric

Question 30

How can you stop a solid from dissolving in a liquid? Should the liquid be heated or cooled?

Accepted Answer

Cool the liquid

Answer

Heat the liquid

Question 31

What is the name of the change when a gas becomes a liquid? Is it evaporation, condensation or deposition?

Accepted Answer

Condensation

Answer

Evaporation

Answer

Deposition

Question 32

Which object is most likely to be magnetic? Is it a wooden spoon, a rubber band, a nail or a piece of paper?

Accepted Answer

Nail

Answer

Wooden spoon

Answer

Rubber band

Answer

Piece of paper

Question 33

When we heat something up, what happens to the tiny pieces inside it?

Accepted Answer

They move faster

Answer

They move slower

Answer

They stop moving

Question 34

Which activity changes food so it looks and tastes different?

Accepted Answer

Baking a cake

Answer

Washing dishes

Answer

Folding clothes

Answer

Watering plants

Question 35

When you heat a solid, it turns into a _____.

Accepted Answer

Liquid

Answer

Plasma

Answer

Solid

Answer

Gas

Question 36

When you add sugar to water and stir, what happens to the sugar?

Accepted Answer

It dissolves.

Answer

It sinks to the bottom.

Answer

It changes colour.

Answer

It floats on top.

Question 37

Which of these cannot be undone?

Accepted Answer

Burning paper

Answer

Dissolving sugar in water

Answer

Mixing sand and water

Answer

Melting ice

Question 38

Why does a balloon stay inflated?

Accepted Answer

The elastic material of the balloon prevents the air from escaping.

Answer

The balloon is filled with a special gas.

Answer

The balloon is tied off.

Answer

The air inside the balloon is heavier than the air outside.

Question 39

Which of these is the best conductor of heat?

Accepted Answer

Metal

Answer

Rubber

Answer

Wood

Answer

Plastic

Question 40

Which of these is NOT an effect of a magnet?

Accepted Answer

A magnet attracting a plastic spoon

Answer

A magnet causing a compass needle to point north

Answer

A magnet attracting a paperclip

Answer

A magnet picking up a nail

Question 41

What can happen when you mix two different liquids together?

Accepted Answer

They can form a new substance

Answer

They always react violently

Answer

They always change colour

Answer

They always separate into layers

Question 42

When heated strongly, which material will change from a solid to a liquid?

Accepted Answer

Ice

Answer

Metal

Answer

Wood

Answer

Rubber

Question 43

What happens to the shape of a plasticine ball when you squeeze it?

Accepted Answer

Changes

Answer

Stays the same

Answer

Gets bigger

Question 44

Which of the following materials cannot soak up water?

Accepted Answer

Plastic

Answer

Sponge

Answer

Paper

Answer

Cloth

Question 45

What is the name for the change when a solid turns into a liquid?

Accepted Answer

Melting

Answer

Freezing

Question 46

Which of these is a change that can be reversed?

Accepted Answer

Melting ice

Answer

Cooking an egg

Answer

Rusting iron

Answer

Burning paper

Question 47

What happens to the size of a gas when it is heated?

Accepted Answer

Increases

Answer

Stays the same

Answer

Decreases

Question 48

Which material allows you to see clearly through it?

Accepted Answer

Glass

Answer

Wood

Answer

Cardboard