Science Review Grade 4 interactive worksheet - Free Printable

Explanation:
Let’s solve each part step by step.

Part 1: Label the Earth layers
The diagram shows a cross-section of Earth with 4 numbered layers, from outermost to innermost.
- Layer 1 is the thin outer layer — that’s the crust.
- Layer 2 is the thick layer beneath the crust — that’s the mantle.
- Layer 3 is the liquid layer surrounding the center — that’s the outer core.
- Layer 4 is the solid center — that’s the inner core.

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

Part 2: Write names of the four outer planets
The planets shown after Mars are: Jupiter, Saturn, Uranus, Neptune.
These are the four outer (gas giant/ice giant) planets.
The worksheet asks for names starting with M, V, M, E — but that seems like a misprint or formatting error (since none of the outer planets start with those letters). However, looking at the layout: there are 4 blank lines labeled M, V, M, E — likely a mistake in the worksheet design. The correct answer is simply the names of the four outer planets:
- Jupiter
- Saturn
- Uranus
- Neptune

But since the worksheet asks to fill in blanks labeled M, V, M, E, and those don’t match, we should ignore the letters and just list the four planets as requested: “Write the names of the four outer planets.” So we write:
Jupiter, Saturn, Uranus, Neptune.

However, the worksheet shows 4 blank lines with M, V, M, E on the left — possibly meant to be first letters? But none of the outer planets start with M, V, or E. Mercury and Venus are inner planets; Mars is also inner. So this is likely a layout error. For correctness, we provide the actual names.

Given standard curriculum, the four outer planets are:
→ Jupiter
→ Saturn
→ Uranus
→ Neptune

We’ll list them in order as they appear in the diagram (left to right after Mars): Jupiter, Saturn, Uranus, Neptune.

Part 3: Classify matter into solid, liquid, gas

We have images and word list:
- lemonade → liquid
- hot air → gas (air is a gas; “hot air” still gas)
- plastic blocks → solid
- stream → liquid (a stream is flowing water)
- rocks → solid
- juice → liquid
- oxygen → gas (oxygen is a gas at room temperature)
- wood → solid
- cola → liquid

Now assign to columns:

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

Check count:
- Solid: 3 items
- Liquid: 4 items
- Gas: 2 items

All 9 words are used.

Now compile final answers clearly.

Final Answer:
1. crust
2. mantle
3. outer core
4. inner core

Four outer planets: Jupiter, Saturn, Uranus, Neptune

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