Exploring Physical and Chemical Changes for Kids

What is an example of a physical change?

• Mixing acid and base

• Melting ice

• Rusting of iron

• Burning wood

What remains unchanged in a physical change?

• The chemical composition

• The color of the object

• The size of the object

• The shape of the object

What does not change in a physical change?

• Chemical structure

• Texture

• Color

• Physical state

Which of the following is a chemical change?

• Burning a log

• Dissolving sugar in water

• Freezing water into ice

• Splitting a chocolate bar

Which process involves a chemical reaction?

• Boiling water

• Cutting paper

• Rusting of iron

• Melting butter

What happens to wood when it burns?

• It melts

• It turns into ash

• It evaporates

• It decomposes

What is formed when iron rusts?

• Iron hydroxide

• Iron sulfate

• Iron oxide

• Iron chloride

What is necessary for a chemical change to occur?

• Physical alteration

• Chemical reaction

• Pressure change

• Temperature change

Which example involves a change in chemical composition?

• Crushing a can

• Burning gasoline

• Dissolving salt in water

• Melting chocolate

What is the outcome when wood is burned?

• It retains its original elements

• It separates into simpler materials

• It returns to its original form

• It turns into a new substance