Evaporation - Free Printable

Worksheet Solution and Explanation

#### Section 1: Choose the correct word from the help box

The help box contains the following words:
- liquid
- evaporation
- heat
- faster
- disappear
- gas
- warmer

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1. The process of ________ changing into a gas is called _________.

- Explanation: The process of a liquid turning into a gas is called "evaporation."
- Answer: The process of liquid changing into a gas is called evaporation.

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2. A liquid will turn into a gas as a result of _______ being applied to the liquid.

- Explanation: Heat energy causes liquids to evaporate by increasing the kinetic energy of the molecules, allowing them to escape into the air.
- Answer: A liquid will turn into a gas as a result of heat being applied to the liquid.

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3. A puddle of water will _________ as a result of being evaporated.

- Explanation: When water evaporates, it changes from a liquid to a gas and leaves behind no visible liquid, effectively "disappearing."
- Answer: A puddle of water will disappear as a result of being evaporated.

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4. The steam you see flowing out of a kettle is a ________.

- Explanation: Steam is water in its gaseous state, which forms when water is heated and evaporates.
- Answer: The steam you see flowing out of a kettle is a gas.

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5. The ________ the temperature, the ________ the liquid will evaporate.

- Explanation: Higher temperatures increase the rate of evaporation because they provide more energy to the liquid molecules, allowing them to escape more quickly.
- Answer: The warmer the temperature, the faster the liquid will evaporate.

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#### Completed Section 1:
1. The process of liquid changing into a gas is called evaporation.
2. A liquid will turn into a gas as a result of heat being applied to the liquid.
3. A puddle of water will disappear as a result of being evaporated.
4. The steam you see flowing out of a kettle is a gas.
5. The warmer the temperature, the faster the liquid will evaporate.

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#### Section 2: Choose 2 examples of evaporation from your everyday life. Type Yes or No.

- Clothes drying on a line: This is an example of evaporation. Water in the clothes turns into vapor and escapes into the air.
- Water drops on a cold glass: This is condensation, not evaporation. Condensation occurs when water vapor in the air cools and turns back into liquid.
- Puddles getting smaller: This is an example of evaporation. Water in the puddle turns into vapor and escapes into the air.
- Juice turning into slushie: This is freezing, not evaporation. Freezing occurs when a liquid turns into a solid due to cooling.

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#### Completed Section 2:
- Clothes drying on a line: Yes
- Water drops on a cold glass: No
- Puddles getting smaller: Yes
- Juice turning into slushie: No

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#### Section 3: A hairdryer uses hot or warm air to dry hair and not cool air. Why? Type Yes or No.

- Warm air causes the water in your hair to evaporate: Yes, warm air increases the temperature of the water in your hair, providing more energy for the water molecules to evaporate.
- Cool air causes the water in your hair to evaporate: No, cool air does not provide enough energy to speed up the evaporation process.

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#### Completed Section 3:
- Warm air causes the water in your hair to evaporate: Yes
- Cool air causes the water in your hair to evaporate: No

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Final Answer:

1.
- The process of liquid changing into a gas is called evaporation.
- A liquid will turn into a gas as a result of heat being applied to the liquid.
- A puddle of water will disappear as a result of being evaporated.
- The steam you see flowing out of a kettle is a gas.
- The warmer the temperature, the faster the liquid will evaporate.

2.
- Clothes drying on a line: Yes
- Water drops on a cold glass: No
- Puddles getting smaller: Yes
- Juice turning into slushie: No

3.
- Warm air causes the water in your hair to evaporate: Yes
- Cool air causes the water in your hair to evaporate: No

Final Boxed Answer:
\boxed{
\text{1. liquid, evaporation, heat, disappear, gas, warmer, faster} \\
\text{2. Yes, No, Yes, No} \\
\text{3. Yes, No}
}