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

Let’s go step by step to solve each part of the worksheet.

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Part 1: Label the Earth Layers

We are given four words:
→ inner core
→ mantle
→ crust
→ outer core

And a diagram with 4 numbered lines pointing to different layers of the Earth.

Remember: The Earth has layers from outside to inside like this:

1. Crust – the thin, hard outer layer (where we live)
2. Mantle – thick middle layer, hot and semi-solid
3. Outer Core – liquid metal layer
4. Inner Core – solid metal center, hottest part

Now look at the diagram:

- Line #1 points to the very center → that’s the inner core
- Line #2 points to the layer around the center → that’s the outer core
- Line #3 points to the thick middle layer → that’s the mantle
- Line #4 points to the very outside layer → that’s the crust

So:

1. inner core
2. outer core
3. mantle
4. crust

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Part 2: Write the names of the four outer planets

The solar system has 8 planets. The first four (closest to the Sun) are called “inner planets”: Mercury, Venus, Earth, Mars.

The next four are called “outer planets” — they are bigger and made mostly of gas or ice. They are:

→ Jupiter
→ Saturn
→ Uranus
→ Neptune

In the picture, you can see them labeled already! So just write their full names under the blanks:

M _ _ _ _ _ _ → Mercury? Wait — no! Mercury is an *inner* planet. Let’s check again.

Wait — the instruction says: “Write the names of the four outer planets.” And below the picture, it shows:

M _________
M _________
V _________
E _________

But those letters don’t match the outer planets. That must be a trick — maybe it’s asking for the *first letter* of each outer planet? But the outer planets start with J, S, U, N.

Looking again at the image: Under the pictures of the planets, it labels:

JUPITER, SATURN, URANUS, NEPTUNE — these ARE the four outer planets.

Then below, there are blanks with:

M _________
M _________
V _________
E _________

That doesn’t make sense unless... wait — perhaps it’s a mistake in the worksheet? Or maybe it’s asking for something else?

Actually — looking more carefully — the line says: “Write the names of the four outer planets.” Then under the diagram, it has:

M _________
M _________
V _________
E _________

But those letters correspond to INNER planets: Mercury, Mars, Venus, Earth.

This seems confusing. But since the question clearly says “four outer planets”, and the diagram shows Jupiter, Saturn, Uranus, Neptune as the outer ones, I think the blanks might be mislabeled — or perhaps it’s a typo.

Alternatively — maybe the student is supposed to ignore the letters and just write the four outer planet names anywhere? But the format suggests filling in after M, M, V, E.

Wait — let me re-read: “Write the names of the four outer planets.” Then it shows all 8 planets, and then has 4 blanks with starting letters: M, M, V, E.

That doesn’t fit. Unless… oh! Maybe it’s not asking for the outer planets’ names to go under those letters — maybe those letters are for something else? No, the layout implies:

After showing all planets, it says:

M _________
M _________
V _________
E _________

Perhaps it’s a separate task? But the heading is “Write the names of the four outer planets.”

I think there’s a formatting error in the worksheet. Since the four outer planets are Jupiter, Saturn, Uranus, Neptune — and none start with M, M, V, E — I believe the intended answer is simply to list those four names, regardless of the letters shown.

But to follow the worksheet exactly — maybe the letters are meant to be ignored? Or perhaps it’s a trick?

Another possibility: Maybe “M” stands for “Massive” or something? Unlikely.

Best approach: Since the question is clear — “write the names of the four outer planets” — and the diagram labels them, I’ll provide:

Jupiter
Saturn
Uranus
Neptune

Even if the blanks have wrong starting letters. Perhaps the worksheet has a typo.

But wait — looking again at the user’s image description — under the planet diagram, it says:

M _________
M _________
V _________
E _________

And above that, the planets are labeled including MERCURY, VENUS, EARTH, MARS — which are inner planets.

Ah! I think I misunderstood. The instruction says: “Write the names of the four outer planets.” But then the blanks are labeled with M, M, V, E — which are for inner planets. That doesn’t make sense.

Unless — is it possible that the worksheet is asking for the outer planets, but the blanks are mistakenly labeled? Or perhaps it’s two different tasks?

No — rereading: “Write the names of the four outer planets.” Then immediately below, the blanks with M, M, V, E.

This is confusing. But logically, the four outer planets are Jupiter, Saturn, Uranus, Neptune. So I will assume the blanks are mislabeled and provide the correct names.

To be safe, let’s note: If the worksheet expects answers starting with M, M, V, E, then it’s wrong — because outer planets don’t start with those letters.

I think the best solution is to write:

Jupiter
Saturn
Uranus
Neptune

And ignore the misleading letters. Or perhaps the letters are for another part? No, the structure suggests otherwise.

Wait — another idea: Maybe “M” is for “Mars”? But Mars is inner. No.

I think there’s an error in the worksheet. As an educational assistant, I should give the correct scientific answer.

So for Part 2, the four outer planets are:

1. Jupiter
2. Saturn
3. Uranus
4. Neptune

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Part 3: Matter - Sort into Solid, Liquid, Gas

We have these items:

- lemonade
- hot air
- plastic blocks
- stream
- rocks
- juice
- oxygen
- wood
- cola

We need to sort them into three categories: solid, liquid, gas.

Recall:

- Solid: Has fixed shape and volume. Doesn’t flow. Examples: rock, wood, plastic.
- Liquid: Takes shape of container, flows, fixed volume. Examples: water, juice, lemonade.
- Gas: Fills entire space, no fixed shape or volume. Examples: air, oxygen, steam.

Now classify each:

- lemonade → liquid (it’s a drink, flows)
- hot air → gas (air is gas, even when hot)
- plastic blocks → solid (hard, keeps shape)
- stream → liquid (flowing water)
- rocks → solid (hard, doesn’t flow)
- juice → liquid (drink, flows)
- oxygen → gas (we breathe it, it’s invisible gas)
- wood → solid (tree material, hard)
- cola → liquid (soda, flows)

So:

Solid: plastic blocks, rocks, wood
Liquid: lemonade, stream, juice, cola
Gas: hot air, oxygen

Note: “stream” is flowing water, so liquid. “hot air” is still air, which is gas. “oxygen” is a gas. “cola” and “lemonade” and “juice” are liquids. “plastic blocks”, “rocks”, “wood” are solids.

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Now, compiling all answers.

Final Answer:

Earth Layers:
1. inner core
2. outer core
3. mantle
4. crust

Four Outer Planets:
Jupiter
Saturn
Uranus
Neptune

*(Note: The worksheet shows blanks with M, M, V, E — but those do not correspond to outer planets. The correct outer planets are listed above.)*

Matter Classification:

| solid | liquid | gas |
|----------------|--------------------|-----------|
| plastic blocks | lemonade | hot air |
| rocks | stream | oxygen |
| wood | juice | |
| | cola | |

*(You can list them in any order within each column.)*