Free Printable Physical and Chemical Properties and Changes Worksheets - Free Printable

Explanation:
Let’s go through each statement one by one and decide if it’s true or false, based on whether the change is *physical* or *chemical*.

🔹 A physical change means the substance stays the same — only its shape, state (solid/liquid/gas), or appearance changes. No new substances form. These are usually reversible.

🔹 A chemical change means a new substance is formed — often with signs like color change, gas production, heat/light, or something that can’t easily be undone.

Now, evaluate each:

1. Evaporation is a physical change.
→ Water turns from liquid to gas (vapor), but it’s still H₂O. No new substance. ✔ True

2. Ice cream melting is a chemical change.
→ It just goes from solid to liquid — still ice cream. No new substance. So this is *physical*, not chemical. ✘ False

3. Wood burning is a physical change.
→ Burning makes ash, smoke, CO₂ — new substances! That’s chemical. ✘ False

4. Water mixing with oil is a physical change.
→ They don’t dissolve; they separate. But no new substances form — just a mixture. ✔ True

5. Air inflating a tire is a chemical change.
→ You’re just squeezing air into space. Air molecules stay the same. Physical change. ✘ False

6. Marshmallows roasting on a fire is a chemical change.
→ The outside browns (Maillard reaction/caramelization) — new substances form. ✔ True

7. Marshmallows cut in half is a chemical change.
→ Just size/shape changed. Still marshmallow. Physical. ✘ False

8. Chemical changes can be easily reversed.
→ Usually *not* easy — e.g., you can’t un-burn wood. Some rare exceptions exist, but generally false. ✘ False

9. Physical changes can be easily reversed.
→ Yes! Freeze melted ice, uncut paper (well, not perfectly, but many like melting/freezing are reversible). Generally true. ✔ True

10. Fermenting cheese and grating cheese are both physical changes.
→ Grating = physical ✔
→ Fermenting = bacteria change milk → new substances (like lactic acid) = chemical ✘
So the whole statement is False (because it says *both* are physical).

11. Freezing water into ice cubes is a physical change.
→ Liquid → solid, still H₂O. ✔ True

12. Iron rusting is a chemical change.
→ Iron + oxygen + water → iron oxide (rust), a new substance. ✔ True

Now list all answers in order:

1. True
2. False
3. False
4. True
5. False
6. True
7. False
8. False
9. True
10. False
11. True
12. True

Final Answer:
True, False, False, True, False, True, False, False, True, False, True, True