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States of Matter

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States of Matter

States of Matter

Particles in different states of matter

🧊 Part 1: Understanding States of Matter

1. Circle the correct answer for each state of matter:

In a solid, particles are:

Close together and vibrating in fixed positions

Far apart and moving freely

Close together but moving around each other

In a liquid, particles are:

Close together and vibrating in fixed positions

Far apart and moving freely

Close together but moving around each other

In a gas, particles are:

Close together and vibrating in fixed positions

Far apart and moving freely

Close together but moving around each other

🌡️ Part 2: Changes of State

2. Fill in the blanks with the correct terms:

When ice changes to water, this process is called ______________. When water changes to steam, this process is called ______________. When steam changes back to water droplets, this process is called ______________. When water changes to ice, this process is called ______________.

3. Match the change of state with its description:
1. Melting
2. Evaporation
3. Condensation
4. Freezing
5. Sublimation
A. Gas to liquid
B. Liquid to gas
C. Solid to liquid
D. Liquid to solid
E. Solid directly to gas

🔬 Part 3: Particle Diagrams

4. Draw particle diagrams for each state of matter in the boxes below. Show how particles are arranged and use arrows to show movement:

Solid (ice):

Liquid (water):

Gas (steam):

🌍 Part 4: Real-Life Examples

5. Tick all the examples that show evaporation:

Clothes drying on a washing line

Ice cubes melting in a drink

Puddles disappearing after rain

Steam rising from a hot cup of tea

Water freezing in the freezer

6. Explain what happens to water particles when you heat water from 20°C to 100°C:

🧪 Part 5: Experiment Observations

7. During our ice melting experiment, record your observations:

Starting temperature of ice: ______°C

Temperature when ice completely melted: ______°C

Time taken for ice to melt: ______ minutes

8. Describe what you observed happening to the ice particles during melting:
9. During the condensation demonstration, explain why water droplets formed on the cold surface:

💭 Part 6: Critical Thinking

10. A student says "When water evaporates, the water disappears completely." Explain why this statement is incorrect using particle theory:
11. Give three examples of changes of state you might observe in your kitchen at home:

Example 1: _________________________________________________

Example 2: _________________________________________________

Example 3: _________________________________________________

12. Challenge: Dry ice (solid carbon dioxide) sublimates at -78°C. Explain what this means and why it's useful for special effects:

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