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

Let's go through each section of the worksheet and solve it step by step.

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Section 1: Label the Earth Layers

Instructions: Use the words below to label the Earth layers.
Words: *inner core, mantle, crust, outer core*

Looking at the diagram of Earth:

- 1 points to the outermost layer → This is the crust
- 2 points to the thick layer beneath the crust → This is the mantle
- 3 points to the innermost solid sphere → This is the inner core
- 4 points to the liquid layer surrounding the inner core → This is the outer core

✔ So the answers are:

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

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Section 2: Write the names of the four outer planets

The image shows all eight planets in order from the Sun:
- Mercury, Venus, Earth, Mars (inner planets)
- Jupiter, Saturn, Uranus, Neptune (outer planets)

The four outer planets are:
- Jupiter
- Saturn
- Uranus
- Neptune

Now, fill in the blanks using the initials:

> M______ V______
> M______ E______

We need to match the letters:
- M = Mars (but that’s an inner planet) → Wait — this might be a trick.

Wait — looking closely, the labels are:
- M______ (likely for Mars) — but Mars is not an outer planet.
- V______ (Venus) — also inner
- M______ (maybe Mercury?) — again, inner
- E______ (Earth) — also inner

But the instruction says: *"Write the names of the four outer planets."* And then there are four blanks with initials.

But the initials are M, V, M, E — which are all inner planets, not outer ones.

Wait — perhaps the letters are meant to be initials of the outer planets?

But Jupiter starts with J, Saturn with S, Uranus with U, Neptune with N.

So maybe the question is asking you to write the names of the outer planets under the correct letters? But that doesn't make sense.

Alternatively, perhaps the labels (M, V, M, E) are not the planets themselves — they're just placeholders.

Wait — let's look again.

Actually, the diagram shows the planets labeled already:
- Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune

Then below, it says:

> M___________ V___________
> M___________ E___________

This seems like a typo or mislabeling. But perhaps it's asking to write the names of the four outer planets in the blanks provided, and the "M" and "V" etc. are just placeholders.

But that doesn’t fit.

Alternatively, maybe the letters are meant to be filled in as the first letter of each outer planet?

No — the instruction says: *"Write the names of the four outer planets."*

And there are four blanks.

So likely, just list the four outer planets:

✔ Jupiter, Saturn, Uranus, Neptune

But where to put them?

Given the format:

> M___________ V___________
> M___________ E___________

It might be a mistake. Perhaps it's supposed to be:

> J ___________
> S ___________
> U ___________
> N ___________

But instead, it has M, V, M, E.

Alternatively, maybe it's asking to identify the outer planets from the diagram and write their names in the boxes.

But since the diagram already labels them, the answer should be:

✔ The four outer planets are: Jupiter, Saturn, Uranus, Neptune

So if we have four blanks, write:

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

But the formatting suggests two rows of two blanks.

Possibly:

- First row: Jupiter, Saturn
- Second row: Uranus, Neptune

But the "M", "V", etc., may be misleading.

Alternatively, perhaps the "M" stands for Mars, but that's not outer.

Wait — another idea: Maybe the letters are clues?

No — it seems more likely that the "M, V, M, E" are just placeholders for writing the names.

But that doesn’t make sense.

Alternatively, maybe the task is to write the names of the four outer planets, and the "M, V, M, E" are not related — just part of the layout.

But that would be confusing.

Wait — perhaps the diagram shows the planets, and the blanks are meant to be filled with the names of the outer planets.

So simply:

✔ Jupiter, Saturn, Uranus, Neptune

So fill in the four blanks accordingly.

Let’s assume the four blanks are:

> 1. _________
> 2. _________
> 3. _________
> 4. _________

Then:

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

But the worksheet shows:

> M___________ V___________
> M___________ E___________

This is confusing.

Wait — maybe it's asking to write the names of the outer planets in the boxes, and the "M", "V", etc. are labels for the inner planets, so you ignore them.

But that doesn't help.

Alternatively, perhaps the "M" and "V" are not for the outer planets — maybe the blank lines are just for writing the names.

Best interpretation: The four outer planets are Jupiter, Saturn, Uranus, Neptune.

So the answer is:

- Jupiter
- Saturn
- Uranus
- Neptune

You can write them in any order, but typically in order from the Sun.

So:

> Jupiter
> Saturn
> Uranus
> Neptune

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Section 3: Matter – Sort into Solid, Liquid, Gas

Words to sort:
- lemonade
- hot air
- plastic blocks
- stream
- rocks
- juice
- oxygen
- wood
- cola

Let’s classify each:

#### Solid (definite shape and volume):
- plastic blocks
- rocks
- wood

#### Liquid (definite volume, takes shape of container):
- lemonade
- juice
- cola
- stream (water flowing — still liquid)
- (Note: "stream" refers to water, so liquid)

#### Gas (no definite shape or volume):
- hot air
- oxygen

(Note: "hot air" is gas; "oxygen" is a gas)

Now, fill in the table:

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

Wait — "stream" is a flow of water, so it's liquid.

So final classification:

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

Note: "hot air" is gas, "oxygen" is gas.

Also, the picture shows:
- bottle of lemonade → liquid
- hot air balloon → hot air (gas)
- plastic blocks → solid
- teapot with steam → steam (gas), but "stream" is listed separately — probably means running water (liquid)
- rocks → solid
- glass of juice → liquid
- person smoking → smoke (gas), but word is "oxygen" — possibly referring to breathing oxygen
- wood → solid
- glass of cola → liquid

So yes, matches.

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✔ Final Answers:

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Earth Layers:

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

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Four Outer Planets:

- Jupiter
- Saturn
- Uranus
- Neptune

(Write these in the four blanks, regardless of M/V/M/E labels — likely a formatting error.)

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Matter Classification:

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

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Let me know if you'd like this formatted as a printable answer key!