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Heat and Matter Changes

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Heat and Matter Changes

🧊 Part 1: Understanding Heat and Changes

1. What happens when ice is left in a warm room?

It gets harder

It melts into water

It stays the same

It disappears completely

2. When ice melts, it changes from a ________ to a ________.

solid / liquid / gas

3. What causes ice to melt?

Adding heat energy

Removing heat energy

Adding cold energy

Nothing causes it

4. Which of these are examples of melting? (Tick all that apply)

Ice cream on a hot day

Chocolate in your hand

Water turning to ice

Butter in a hot pan

5. What happens when liquid water is put in the freezer?

It stays liquid

It becomes a gas

It freezes into ice

It gets warmer

🌡️ Part 2: Observations and Explanations

6. Draw what happens to an ice cube when heat is added to it. Show the before and after.
7. Explain in your own words what happens when ice melts.
8. Complete this sentence: When we remove heat energy from water, it will ________________.
9. Circle the correct temperature for each state:

Ice: Below 0°C / Above 0°C

Liquid water: Below 0°C / Above 0°C

10. Why do you think we use thermometers when studying melting and freezing?

🔬 Part 3: Scientific Thinking

11. Predict what would happen if you left an ice cube in each place. Write "melts quickly", "melts slowly", or "stays frozen".

In the sun: ________________

In the shade: ________________

In the freezer: ________________

On a hot footpath: ________________

12. Use these scientific words to complete the sentences: solid, liquid, heat, freezing, melting

Ice is a ________. Water is a ________.

________ happens when we add heat energy.

________ happens when we remove ________ energy.

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