Grade 4 Science Review Worksheet covering Earth's layers, outer planets, and states of matter.

Let's solve the problems step by step:

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Part 1: Label the Earth Layers

The task is to label the layers of the Earth using the words provided: inner core, mantle, crust, outer core.

#### Earth Layers Diagram Explanation:
1. The crust is the outermost layer of the Earth.
2. Below the crust is the mantle, which is a thick layer.
3. Inside the mantle is the outer core, which is liquid.
4. At the very center is the inner core, which is solid.

#### Labeling:
- 1: Crust
- 2: Mantle
- 3: Outer Core
- 4: Inner Core

So, the answers are:
1. Crust
2. Mantle
3. Outer Core
4. Inner Core

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Part 2: Write the Names of the Four Outer Planets

The task is to identify the four outer planets from the given image.

#### Explanation:
The solar system has eight planets in total. The four outer planets are:
1. Jupiter
2. Saturn
3. Uranus
4. Neptune

These are also known as the "gas giants."

#### Answer:
- M: Jupiter
- V: Saturn
- E: Uranus
- N: Neptune

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Part 3: Classify Matter into Solid, Liquid, and Gas

The task is to classify the given items into three categories: solid, liquid, and gas.

#### Items and Their States:
1. Lemonade: Liquid
2. Hot Air: Gas
3. Plastic Blocks: Solid
4. Stream: Liquid (water)
5. Rocks: Solid
6. Juice: Liquid
7. Oxygen: Gas
8. Wood: Solid
9. Cola: Liquid

#### Classification:
- Solid: Plastic blocks, rocks, wood
- Liquid: Lemonade, stream, juice, cola
- Gas: Hot air, oxygen

#### Final Answer:
- Solid: Plastic blocks, rocks, wood
- Liquid: Lemonade, stream, juice, cola
- Gas: Hot air, oxygen

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Final Answers Summarized:

1. Earth Layers:
- 1: Crust
- 2: Mantle
- 3: Outer Core
- 4: Inner Core

2. Four Outer Planets:
- M: Jupiter
- V: Saturn
- E: Uranus
- N: Neptune

3. Classification of Matter:
- Solid: Plastic blocks, rocks, wood
- Liquid: Lemonade, stream, juice, cola
- Gas: Hot air, oxygen

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Boxed Final Answer:

\[
\boxed{
\text{1. Crust, 2. Mantle, 3. Outer Core, 4. Inner Core; Jupiter, Saturn, Uranus, Neptune; Solid: Plastic blocks, rocks, wood; Liquid: Lemonade, stream, juice, cola; Gas: Hot air, oxygen}
}
\]