For primary school students or lower ability students

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3. Physical vs. Chemical Changes
• A physical change is a
change that affects
one or more physical
properties of a
substance but does not
change its chemical
composition.
• A chemical change is a
change that results in
the formation of new
chemical substances.

4. Physical Change
During a physical change, the substance may change in
form, state, or appearance (such as melting, freezing,
dissolving, or breaking) but does not produce a new
substance.

5. Examples of Physical Change
• Melting ice
• Breaking a window
• Cutting paper
• Boiling water
• Making lemonade
• Breaking a pencil

6. Turn and Talk
Think of a physical change you have seen or
experienced recently, such as melting ice or cutting
paper.
Share your example with a partner and explain why it
is a physical change.

7. Chemical Change
This change often involves the rearrangement of atoms and
can produce heat, light, gas, or a color change.

8. Examples of Chemical Change
• Baking a cake
• Burning wood
• Rust on your bike
• Using a battery
• Frying an egg
• Fireworks

9. Turn and Talk
Can you think of a chemical change you've witnessed,
like baking cookies or rust forming on a bike?
Share your example with a partner and discuss what
new substances were created during that change.

10. Summary
• Physical changes involve changes in state or
appearance without changing the chemical
identity.
• Chemical changes create new substances and
often involve energy changes.

11. What is one key difference between a physical change
and a chemical change?
Provide an example of each to illustrate your answer.
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