Changes in the states of matter worksheet - Free Printable

Let's solve the problem step by step based on the image you provided. The worksheet is about changes in the state of matter of water, specifically focusing on the transitions between solid, liquid, and gas states, and whether each process involves gaining or losing heat.

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🔹 Step 1: Understand the States

- SOLID: Ice (frozen water)
- LIQUID: Water (in a glass)
- GAS: Steam (water vapor)

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🔹 Step 2: Identify the Processes and Changes

#### ✔ From SOLID → LIQUID (Ice → Water)
- Process: Melting
- Change: Solid to liquid
- Heat involved: Gain of heat
*(Energy is absorbed to break the bonds in ice)*

> 🟨 Arrow from solid to liquid: gain heat

#### ✔ From LIQUID → GAS (Water → Steam)
- Process: Evaporation / Boiling
*(Boiling is more accurate here since it shows steam rising from a pot)*
- Change: Liquid to gas
- Heat involved: Gain of heat
*(Energy is needed to turn liquid into vapor)*

> 🟨 Arrow from liquid to gas: gain heat

#### ✔ From LIQUID → SOLID (Water → Ice)
- Process: Freezing
- Change: Liquid to solid
- Heat involved: Lose heat
*(Energy is released as molecules slow down and form a solid structure)*

> 🔵 Arrow from liquid to solid: lose heat

#### ✔ From GAS → LIQUID (Steam → Water droplets)
- Process: Condensation
- Change: Gas to liquid
- Heat involved: Lose heat
*(Steam cools and turns back into liquid; heat is released)*

> 🔵 Arrow from gas to liquid: lose heat

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✔ Final Answer:

Here’s how to fill in the blanks:

#### Left Side (Solid → Liquid):
- Process: Melting
- Change: Solid to liquid
- Arrow: gain heat

#### Right Side (Liquid → Gas):
- Process: Boiling (or Evaporation)
- Change: Liquid to gas
- Arrow: gain heat

#### Bottom Left (Liquid → Solid):
- Process: Freezing
- Change: Liquid to solid
- Arrow: lose heat

#### Bottom Right (Gas → Liquid):
- Process: Condensation
- Change: Gas to liquid
- Arrow: lose heat

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📝 Summary Table:

| Direction | Process | Change | Heat Involved |
|---------|---------------|--------------------|----------------|
| Solid → Liquid | Melting | Solid → Liquid | Gain |
| Liquid → Gas | Boiling | Liquid → Gas | Gain |
| Liquid → Solid | Freezing | Liquid → Solid | Lose |
| Gas → Liquid | Condensation| Gas → Liquid | Lose |

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✔ This completes the worksheet! Let me know if you'd like a printable version or explanation for students.