Changing states of matter interactive worksheet - Free Printable

Problem Analysis:

The task involves filling in the blanks using the provided word bank and then providing examples of matter changes in everyday life. Let's solve it step by step.

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Word Bank:

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

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Filling in the Blanks:

1. The state of matter where the molecules are far apart and move around freely is called a _________.
- Molecules that are far apart and move freely describe the gas state.
- Answer: gas

2. The state of matter where the molecules are tightly packed together and do not move is called a _________.
- Molecules that are tightly packed and do not move describe the solid state.
- Answer: solid

3. The state of matter where the molecules move around a little bit, and it takes the shape of its container is called a _________.
- Molecules that move slightly and take the shape of their container describe the liquid state.
- Answer: liquid

4. To make matter change states, you need to add or take away _________.
- Adding or removing heat is what causes matter to change states.
- Answer: heat

5. When you add heat to a solid, it will _________ into a liquid.
- Adding heat to a solid causes it to melt into a liquid.
- Answer: melt

6. When you take away heat from a liquid, it will _________ into a solid.
- Taking heat away from a liquid causes it to freeze into a solid.
- Answer: freeze

7. When you add heat to a liquid, it will turn into a gas; this is called _________.
- Adding heat to a liquid causes it to evaporate into a gas.
- Answer: evaporation

8. When you take away heat from a gas, it will cause liquid to form; this is called _________.
- Taking heat away from a gas causes it to condense into a liquid.
- Answer: condensation

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Completed Sentences:

1. The state of matter where the molecules are far apart and move around freely is called a gas.
2. The state of matter where the molecules are tightly packed together and do not move is called a solid.
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.
4. To make matter change states, you need to add or take away heat.
5. When you add heat to a solid, it will melt into a liquid.
6. When you take away heat from a liquid, it will freeze into a solid.
7. When you add heat to a liquid, it will turn into a gas; this is called evaporation.
8. When you take away heat from a gas, it will cause liquid to form; this is called condensation.

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Examples of Matter Changes in Everyday Life:

#### 1. Solid to Liquid
- Example: Ice cubes melting in a glass of water.
- Explanation: Heat is added to the ice (solid), causing it to melt into water (liquid).

#### 2. Liquid to Gas
- Example: Water boiling in a pot on a stove.
- Explanation: Heat is added to the water (liquid), causing it to evaporate into steam (gas).

#### 3. Gas to Liquid
- Example: Water droplets forming on the outside of a cold glass.
- Explanation: Heat is removed from the water vapor (gas) in the air, causing it to condense into liquid droplets on the glass.

#### 4. Liquid to Solid
- Example: Water freezing into ice in a freezer.
- Explanation: Heat is removed from the water (liquid), causing it to freeze into ice (solid).

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Final Answer:

\[
\boxed{
\begin{array}{l}
1. \text{gas} \\
2. \text{solid} \\
3. \text{liquid} \\
4. \text{heat} \\
5. \text{melt} \\
6. \text{freeze} \\
7. \text{evaporation} \\
8. \text{condensation} \\
\end{array}
}
\]

#### Examples:
- Solid to Liquid: Ice cubes melting in water.
- Liquid to Gas: Water boiling in a pot.
- Gas to Liquid: Water droplets forming on a cold glass.
- Liquid to Solid: Water freezing into ice in a freezer.