Science Review Grade 4 interactive worksheet - Free Printable

Let's solve each section of this Grade 4 Science Review Worksheet step by step and explain the answers.

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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*

Look at the diagram of Earth showing four layers from the outside in:

1. (Outermost layer) → This is the crust – the thin, solid outer layer where we live.
2. Next layer inward → The mantle – a thick layer made of hot, semi-solid rock.
3. Next layer inward → The outer core – a liquid layer made mostly of iron and nickel.
4. Innermost layer → The inner core – a solid ball of iron and nickel at the center.

✔ Answers:
1. Crust
2. Mantle
3. Outer core
4. Inner core

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Section 2: Write the names of the four outer planets

The image shows all eight planets in order:
- 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 under "M", "V", "M", "E" — these are likely initials for planet names.

But looking closely:
- M ___ → Mars (but Mars is an inner planet) — wait, this seems confusing.

Wait — the prompt says: *"Write the names of the four outer planets."* And then there are four blanks labeled:
- M ___
- V ___
- M ___
- E ___

This may be a typo or mislabeling. But if you look at the image, it's likely that the letters are meant to be initials of the outer planets.

But the outer planets are:
- Jupiter
- Saturn
- Uranus
- Neptune

So perhaps the labels "M", "V", "M", "E" are not related to the outer planets' names? Or maybe it’s a mistake.

Alternatively, maybe the worksheet wants you to write the names of the four outer planets in the boxes, using the initials as clues?

But none of the outer planets start with M, V, M, E.

Wait — perhaps the M, V, M, E are meant to represent Mars, Venus, Mercury, Earth — but those are the inner planets!

This is likely a mistake in the worksheet design.

But the instruction clearly says: *"Write the names of the four outer planets."*

So let's ignore the M/V/M/E labels and just list the four outer planets.

✔ Answer:
- Jupiter
- Saturn
- Uranus
- Neptune

If the worksheet has blank lines under M, V, M, E, perhaps it's a trick — but since none of the outer planets start with those letters, it's probably an error.

Best interpretation: Just write the four outer planets in order:
1. Jupiter
2. Saturn
3. Uranus
4. Neptune

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

We are given a list of items:
- lemonade
- hot air
- plastic blocks
- stream
- rocks
- juice
- oxygen
- wood
- cola

And images corresponding to each item.

Let’s classify them:

#### ✔ Solid – has definite shape and volume
- plastic blocks (hard, fixed shape)
- rocks (solid minerals)
- wood (solid material)

#### ✔ Liquid – flows, takes shape of container, definite volume
- lemonade (liquid drink)
- juice (liquid)
- cola (carbonated drink)
- stream (flowing water — liquid)

> Note: "Stream" refers to flowing water, so it's liquid.

#### ✔ Gas – no fixed shape or volume, expands to fill container
- hot air (air is gas; heated air is still gas)
- oxygen (gas)
- (Note: the person smoking — smoke is gas/particulates, but "oxygen" is listed separately)

Wait — the word list includes:
- hot air
- oxygen
- (smoke from cigarette — but not labeled)

But the word "oxygen" is listed — that's a gas.

Also, "hot air" is gas.

Is there another one?

Let’s check:
- stream → liquid
- plastic blocks → solid
- rocks → solid
- wood → solid
- lemonade → liquid
- juice → liquid
- cola → liquid
- hot air → gas
- oxygen → gas

So two gases: hot air, oxygen

But the image shows a person smoking — that’s smoke, which is a mixture of gas and particles — but since "oxygen" is listed, we use that.

Wait — the word list says: hot air, plastic blocks, stream, rocks, juice, oxygen, wood, cola

That’s 8 items.

But the image shows 9 items — including a bottle of lemonade, hot air balloon, plastic blocks, kettle (steam), rocks, juice, woman smoking, wood, cola.

So the missing word is lemonade.

List of words provided:
- lemonade
- hot air
- plastic blocks
- stream
- rocks
- juice
- oxygen
- wood
- cola

Yes, 9 words.

Now sort them:

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#### ✔ Solid
- plastic blocks
- rocks
- wood

#### ✔ Liquid
- lemonade
- juice
- cola
- stream (water flowing)

> Note: “stream” is a body of water — liquid

#### ✔ Gas
- hot air
- oxygen
- steam (from kettle) — but is “steam” in the word list?

Wait — the word list does not include “steam”. It includes “hot air”, “oxygen”.

But the image shows steam rising from a kettle — and the word “stream” is already used.

Wait — the word “stream” might refer to a stream of water, not steam.

So steam is not in the word list.

But the word list has:
- hot air → gas
- oxygen → gas

And the image has:
- A hot air balloon → hot air (gas)
- A kettle with steam → steam (gas), but no word "steam" in list

So only two gases listed: hot air, oxygen

But there are three gas-related images: hot air balloon, steam, and oxygen (from person breathing?)

Wait — the person is smoking — that’s smoke, which is gas + particles.

But the word "oxygen" is listed — and it's a gas.

So likely, "oxygen" is meant to represent the gas category.

But we need to assign the words to categories.

So go back to the word list:

Words to sort:
- lemonade → liquid
- hot air → gas
- plastic blocks → solid
- stream → liquid (flowing water)
- rocks → solid
- juice → liquid
- oxygen → gas
- wood → solid
- cola → liquid

Now group:

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✔ Final Classification:

| Solid | Liquid | Gas |
|------------------|----------------|------------------|
| plastic blocks | lemonade | hot air |
| rocks | juice | oxygen |
| wood | cola | |
| | stream | |

> Note: "stream" is liquid (water), even though it's moving.

So:

- Solids: plastic blocks, rocks, wood
- Liquids: lemonade, juice, cola, stream
- Gases: hot air, oxygen

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✔ Final Answers:

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1. Earth Layers

1. Crust
2. Mantle
3. Outer core
4. Inner core

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2. Four Outer Planets

- Jupiter
- Saturn
- Uranus
- Neptune

*(Even though the worksheet has M/V/M/E labels, they don't match the outer planets — possibly a mistake. Just write the correct names.)*

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3. Matter Classification

| Solid | Liquid | Gas |
|-------------------|------------------|------------------|
| plastic blocks | lemonade | hot air |
| rocks | juice | oxygen |
| wood | cola | |
| | stream | |

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✔ Summary of All Answers:

#### Earth Layers:
1. Crust
2. Mantle
3. Outer core
4. Inner core

#### Outer Planets:
- Jupiter
- Saturn
- Uranus
- Neptune

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

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