Worksheets on changing states of matter for science education.

The image shows a set of educational worksheets titled "Changing States of Matter" designed for young learners, likely in elementary school. These worksheets are meant to teach children about how matter changes between solid, liquid, and gas states through processes like melting, freezing, evaporation, and condensation.

Let's go through each worksheet and solve the tasks:

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Worksheet 1: "When some solids are heated..."

This page explains:
- When solids are heated, they melt into liquids.
- When liquids are heated until very hot and boiling, they evaporate into gases.

Task: Match pictures to the correct word (melt, freeze, evaporate, condense).

#### Images and Matching:
1. A block of ice melting into water → melt
2. A kettle with steam coming out → evaporate
3. A glass of water with droplets forming on the outside → condense (water vapor in air cools and turns back into liquid)
4. A candle flame heating wax → melt

> ✔ So, draw lines:
> - Ice melting → melt
> - Kettle steaming → evaporate
> - Glass with droplets → condense
> - Candle wax softening → melt

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Worksheet 2: "Draw a line to the change of state"

This is similar to the first one but more focused on matching images to vocabulary.

#### Images:
1. Ice cube melting → melt
2. Kettle boiling → evaporate
3. Water droplet forming on a cold glass → condense
4. Water turning to ice → freeze

> ✔ Correct matches:
> - Ice melting → melt
> - Kettle → evaporate
> - Cold glass with droplets → condense
> - Water becoming ice → freeze

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Worksheet 3: "Changing States of Matter Review"

This sheet has thought bubbles asking questions:

1. What happens when solids are heated?
➤ They melt and become liquids.

2. What happens when liquids are cooled?
➤ They freeze and become solids.

3. What happens when gases are cooled?
➤ They condense and become liquids.

4. What happens when liquids are heated?
➤ They evaporate and become gases.

> ✔ Answers:
> - Solids heated → melt
> - Liquids cooled → freeze
> - Gases cooled → condense
> - Liquids heated → evaporate

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Summary of Key Concepts:

| Change | What Happens |
|--------|--------------|
| Melting | Solid → Liquid (e.g., ice → water) |
| Freezing | Liquid → Solid (e.g., water → ice) |
| Evaporation | Liquid → Gas (e.g., water → steam) |
| Condensation | Gas → Liquid (e.g., steam → water droplets) |

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Final Answer:

To complete the worksheets correctly:
- Match the images to the words: melt, freeze, evaporate, condense
- Fill in the review questions with:
- Solids heated → melt
- Liquids cooled → freeze
- Gases cooled → condense
- Liquids heated → evaporate

These activities help students visualize and understand physical changes in matter due to temperature changes — a foundational science concept.

✔ The worksheets are excellent for reinforcing vocabulary and real-life examples of phase changes!