Changing states of matter interactive worksheet - Free Printable

Let's solve this step by step.

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Word Bank:

- solid
- liquid
- gas
- melt
- freeze
- condensation
- heat
- evaporation

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Fill in the blanks:

1. The state of matter where the molecules are far apart and move around freely is called a
→ gas
*(Gas molecules have high kinetic energy, are far apart, and move freely.)*

2. The state of matter where the molecules are tightly packed together and do not move is called a
→ solid
*(In solids, particles are closely packed and vibrate in place.)*

3. The state of matter where the molecules move around a little bit, and it takes the shape of its container is called a
→ liquid
*(Liquids flow and take the shape of their container; molecules are close but can slide past each other.)*

4. To make matter change states, you need to add or take away
→ heat
*(Heat energy causes changes in molecular motion, leading to phase changes.)*

5. When you add heat to a solid it will ________ into a liquid.
→ melt
*(Melting is the process where a solid turns into a liquid due to added heat.)*

6. When you take away heat from a liquid it will ________ into a solid.
→ freeze
*(Freezing occurs when a liquid loses heat and becomes a solid.)*

7. When you add heat to a liquid it will turn into a gas; this is called
→ evaporation
*(Evaporation is the process where a liquid turns into a gas. Note: Boiling is also a form, but "evaporation" fits here as it’s in the word bank.)*

8. When you take away heat from a gas, it will cause liquid to form; this is called
→ condensation
*(Condensation is when a gas cools and turns into a liquid. Example: dew forming on grass.)*

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Now, examples for each type of matter change in everyday life:

| SOLID TO LIQUID | LIQUID TO GAS | GAS TO LIQUID | LIQUID TO SOLID |
|---------------------|-------------------|-------------------|----------------------|
| Ice melting into water (e.g., ice cubes in a drink) | Water evaporating from a puddle on the ground | Steam from a kettle turning into droplets on a cold window | Water freezing into ice in the freezer |

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✔ Final Answers:

1. gas
2. solid
3. liquid
4. heat
5. melt
6. freeze
7. evaporation
8. condensation

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✔ Examples:

- Solid to liquid: Ice melting in your hand.
- Liquid to gas: Water boiling in a pot.
- Gas to liquid: Fog forming on a mirror.
- Liquid to solid: Water turning into ice in the freezer.

These are common, observable changes in daily life that demonstrate the physical properties of matter and how they change with temperature.

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