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Phase Changes in Matter worksheet with interactive activities and diagrams.

A worksheet titled "Phase Changes in Matter" with two sections: Part One asks students to fill in blanks using a word bank to describe phase changes in a diagram of a beaker, and Part Two involves reading a passage about a glass of lemonade and identifying the phase change that occurred.

A worksheet titled "Phase Changes in Matter" with two sections: Part One asks students to fill in blanks using a word bank to describe phase changes in a diagram of a beaker, and Part Two involves reading a passage about a glass of lemonade and identifying the phase change that occurred.

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Show Answer Key & Explanations Step-by-step solution for: 7th Grade Science worksheets - Edform

Problem Analysis:


The image contains two parts:
1. Part One: Fill in the Blanks
This part involves completing a flowchart of phase changes using terms from the word bank provided.

2. Part Two: Phase Change Read, Discuss, Respond
This part describes a scenario involving a phase change and asks for identification of the phase change, the states of matter involved, and a description of what occurred.

---

Solution:



#### Part One: Fill in the Blanks
The flowchart illustrates the transitions between different states of matter (solid, liquid, gas) through various processes such as melting, freezing, evaporation, condensation, etc. The word bank provides the necessary terms to fill in the blanks.

Here is the completed flowchart with explanations:

```
Solid

Add heat energy → Liquid

Remove heat energy ← Freezing

Evaporation → Gas

Condensation ← Remove heat energy

Add heat energy → Liquid
```

- Solid → Liquid: When heat energy is added to a solid, it melts into a liquid.
- Liquid → Solid: When heat energy is removed from a liquid, it freezes into a solid.
- Liquid → Gas: When heat energy is added to a liquid, it evaporates into a gas.
- Gas → Liquid: When heat energy is removed from a gas, it condenses into a liquid.

#### Final Answer for Part One:
```
Solid → Add heat energy → Liquid → Evaporation → Gas
↑ ↓
Remove heat energy ← Freezing Condensation ← Remove heat energy
```

---

#### Part Two: Phase Change Read, Discuss, Respond

The scenario describes Ms. Staal taking a cold glass of lemonade outside on a hot day. After some time, water droplets form on the outside of the glass. We need to identify the phase change, the states of matter involved, and describe what occurred.

##### Step 1: Identify the Phase Change
The water droplets on the outside of the glass are formed due to condensation. Here's why:
- The glass is very cold because of the ice inside.
- The warm, humid air outside comes into contact with the cold surface of the glass.
- The water vapor in the air loses heat energy when it touches the cold glass and condenses into liquid water droplets.

##### Step 2: States of Matter Involved
- State of Matter 1: Gas (water vapor in the air)
- State of Matter 2: Liquid (water droplets on the glass)

##### Step 3: Description of What Occurred
The warm, humid air contains water vapor. When this water vapor comes into contact with the cold surface of the glass, it loses heat energy and changes from a gas to a liquid, forming visible water droplets on the outside of the glass.

##### Final Answer for Part Two:
- Name of Phase Change: Condensation
- State of Matter 1: Gas
- State of Matter 2: Liquid
- Description of what occurred: Water vapor in the warm, humid air lost heat energy when it came into contact with the cold surface of the glass, causing it to condense into liquid water droplets.

---

Final Answers:


1. Part One:
```
Solid → Add heat energy → Liquid → Evaporation → Gas
↑ ↓
Remove heat energy ← Freezing Condensation ← Remove heat energy
```

2. Part Two:
- Name of Phase Change: Condensation
- State of Matter 1: Gas
- State of Matter 2: Liquid
- Description of what occurred: Water vapor in the warm, humid air lost heat energy when it came into contact with the cold surface of the glass, causing it to condense into liquid water droplets.

Final Boxed Answer:
\[
\boxed{\text{Condensation, Gas, Liquid}}
\]
Parent Tip: Review the logic above to help your child master the concept of science worksheet for 7th grade free.
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