Science: Bones and muscles | Worksheet | PrimaryLeap.co.uk - Free Printable

Let's solve the worksheet step by step using the word bank provided. The words in the box are:

Word Bank:
- ribs
- skeletons
- move
- joints
- pairs
- skull
- movement
- bones
- easily
- protection
- expanding

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Passage with blanks to fill:

> Our skeletons are very useful. They have three functions, __________, support and __________. The __________ protects our brains, the __________ protect our heart and lungs. Without our __________ our bodies would collapse.
>
> Our bones are connected by __________. Our knees are joints.
> Muscles are attached to the __________ of our skeleton. Muscles allow our bones to __________ by contracting and __________.
>
> Muscles usually work in __________.
> Cartilage protects the bones and allows them to move __________.

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Now, let’s go through each blank logically.

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1. "They have three functions, __________, support and __________."

The three main functions of the skeleton are:
- Protection
- Support
- Movement

So the first blank is protection, and the second is movement.

✔ So far: *protection, support and movement*

2. "The __________ protects our brains..."

The skull protects the brain.

✔ Fill in: skull

3. "...the __________ protect our heart and lungs."

The ribs form the ribcage, which protects the heart and lungs.

✔ Fill in: ribs

4. "Without our __________ our bodies would collapse."

This refers to bones — they give structure and support.

✔ Fill in: bones

5. "Our bones are connected by __________."

Bones are connected by joints.

✔ Fill in: joints

6. "Muscles are attached to the __________ of our skeleton."

Muscles attach to bones.

✔ Fill in: bones

7. "Muscles allow our bones to __________ by contracting and __________."

Muscles cause movement by contracting and expanding (or relaxing). The word "expanding" is in the word bank.

So: muscles allow bones to move by contracting and expanding.

✔ Fill in: move, expanding

8. "Muscles usually work in __________."

Muscles work in pairs — one contracts while the other relaxes.

✔ Fill in: pairs

9. "Cartilage protects the bones and allows them to move __________."

Cartilage reduces friction and allows smooth movement — so they move easily.

✔ Fill in: easily

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✔ Final Filled-In Passage:

> Our skeletons are very useful. They have three functions, protection, support and movement. The skull protects our brains, the ribs protect our heart and lungs. Without our bones our bodies would collapse.
>
> Our bones are connected by joints. Our knees are joints.
> Muscles are attached to the bones of our skeleton. Muscles allow our bones to move by contracting and expanding.
>
> Muscles usually work in pairs.
> Cartilage protects the bones and allows them to move easily.

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✔️ Words Used from the Word Bank:

- protection ✔
- movement ✔
- skull ✔
- ribs ✔
- bones ✔
- joints ✔
- expanding ✔
- pairs ✔
- easily ✔

Leftover words: skeletons, move — but note: “move” was used in the sentence “allow our bones to move”, so it’s correct. Wait — we already used move in the sentence?

Wait! Let's check:
We used movement and move — both are in the word bank.

But move is a verb, and movement is a noun. Both are acceptable.

However, the word move appears in the word bank, and we used move in the sentence:
"Muscles allow our bones to move..."

Yes — that’s correct.

So all words used:
- protection
- movement
- skull
- ribs
- bones
- joints
- expanding
- pairs
- easily
- move

Wait — skeletons was not used? But the sentence says:
"Our skeletons are very useful." — the word skeletons is already in the text, not a blank. So we don’t need to use it in the blanks.

So all blanks are filled correctly.

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✔ Final Answer:

Completed Worksheet:

> Our skeletons are very useful. They have three functions, protection, support and movement. The skull protects our brains, the ribs protect our heart and lungs. Without our bones our bodies would collapse.
>
> Our bones are connected by joints. Our knees are joints.
> Muscles are attached to the bones of our skeleton. Muscles allow our bones to move by contracting and expanding.
>
> Muscles usually work in pairs.
> Cartilage protects the bones and allows them to move easily.

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🔍 Explanation:

- Protection: Bones like the skull and ribs shield vital organs.
- Support: Bones provide structure; without them, the body collapses.
- Movement: Muscles pull on bones at joints to create motion.
- Joints: Connect bones and allow movement.
- Muscle pairs: For example, biceps and triceps work together.
- Cartilage: Smooths joint surfaces and allows easy movement.

This worksheet teaches key science concepts about the human skeleton and musculature in a simple, engaging way.

✔ All answers are consistent with the word bank and scientific understanding.