States of Matter - Reading Comprehension Worksheets - Laney Lee - Free Printable

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🔹 Section 1: Temperature vs Time Graph

This graph shows how temperature changes over time as a substance is heated. It has labeled points A–D and plateaus (flat lines), which represent phase changes.

#### Questions:
1. At which point in the graph is it melting?
→ Answer: Point B
→ Explanation: The first plateau (flat line) occurs at ~0°C, which is the melting point of water. During melting, temperature stays constant as energy breaks bonds in the solid.

2. At which point is it a liquid?
→ Answer: Between points B and C
→ Explanation: After melting (point B), the substance becomes liquid. It remains liquid until boiling begins at point C.

3. At which point is it a solid?
→ Answer: Before point B (from A to B)
→ Explanation: The substance starts as a solid and heats up until it reaches its melting point.

4. Where is condensation happening?
→ Answer: This graph only shows heating, not cooling. So condensation does not occur here.
→ Note: Condensation would appear on a cooling graph when gas turns into liquid.

5. At what temperature does this even occur?
→ Answer: 0°C
→ Explanation: Melting happens at 0°C for water. This is shown by the flat line at 0°C.

6. Where is freezing happening?
→ Answer: Not shown. Freezing would happen during cooling at 0°C.
→ Note: This graph shows heating, so freezing doesn’t occur.

7. At what temperature does this happen?
→ Answer: 100°C
→ Explanation: Boiling (liquid to gas) occurs at 100°C, seen at the second plateau (point C to D).

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🔹 Section 2: Cut and Paste – Match Objects to State of Matter

You are to cut out objects and place them under SOLID, LIQUID, or GAS.

Examples:
- SOLID: Ocean (no — ocean is liquid), OXYGEN (gas), SNOW (solid), JUICE (liquid), AIR (gas)
- Correct matching:
- SOLID: Snow
- LIQUID: Juice, Ocean
- GAS: Oxygen, Air

> ✔ Correct Answers:
> - SOLID: Snow
> - LIQUID: Ocean, Juice
> - GAS: Oxygen, Air

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🔹 Section 3: True/False – States of Matter Definitions

Match definitions to examples:

1. DESK – YES / NO → YES (solid)
2. AIR – YES / NO → YES (gas)
3. WATER – YES / NO → YES (liquid)
4. LIGHT – YES / NO → NO (light is not matter)
5. YOUR BODY – YES / NO → YES (made of matter)
6. BACKPACK – YES / NO → YES (solid)
7. DIRT – YES / NO → YES (solid mixture)
8. JUICE – YES / NO → YES (liquid)
9. PAPER – YES / NO → YES (solid)
10. THE SUN – YES / NO → YES (plasma, but often considered matter)

> ⚠️ Note: "The Sun" is actually plasma, not one of the three standard states. But since plasma is made of matter, it's still YES.

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🔹 Section 4: Reading Comprehension & Definitions

#### Key Concepts from Text:
- Melting: Solid → Liquid (at melting point)
- Freezing: Liquid → Solid
- Evaporation: Liquid → Gas (at any temperature)
- Condensation: Gas → Liquid (cooling)
- Boiling: Liquid → Gas (at boiling point)

#### Example Question:
> What is matter?
> → Answer: Anything that has mass and takes up space. Made of particles.

> What is heat?
> → Answer: Measure of particle motion; more movement = hotter.

> How do particles behave in solids, liquids, gases?
> - Solid: Particles vibrate in fixed positions.
> - Liquid: Particles move past each other but stay close.
> - Gas: Particles move freely and rapidly.

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🔹 Summary of Answers

| Question | Answer |
|--------|--------|
| 1. Melting point | Point B |
| 2. Liquid state | Between B and C |
| 3. Solid state | Before B |
| 4. Condensation | Not shown |
| 5. Melting temp | 0°C |
| 6. Freezing | Not shown |
| 7. Boiling temp | 100°C |
| Object sorting | Snow → Solid; Ocean, Juice → Liquid; Oxygen, Air → Gas |
| Matter? | Desk, Air, Water, Your Body, Backpack, Dirt, Juice, Paper, Sun → YES; Light → NO |

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📝 Final Tips for Students:

- Use the graph’s plateaus to identify phase changes (flat lines = energy used for change, not temperature rise).
- Remember: Melting and freezing happen at the same temperature (0°C for water).
- Boiling and condensation happen at 100°C for water.
- Matter = anything with mass and volume. Light is energy, not matter.

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