Your skeleton and muscles

Science · Organisms & Life Processes · ages 7-8

Name ______________________ Date ____________

Which body part protects your brain?
- Ribs
- Skull
- Backbone
What are the three jobs of your skeleton?
- Support, protection, movement
- Breathing, digesting, growing
- Bending, stretching, jumping
Muscles are attached to your bones.
Circle one: True False
When you bend your arm, what do your muscles do?
- They turn into bone
- They pull on the bone
- They disappear
What do your ribs protect?
- Your stomach and legs
- Your skin and hair
- Your heart and lungs
How many main jobs does your skeleton have? Type the number.
Answer: ______________
Mia's arm feels sore after she practiced pulling a rope for gym class. Which body part did the work of pulling?
- Her muscles
- Her skin
- Her skull
Leo says, "My skull is the only bone that protects an organ." What is wrong with what Leo said?
- Nothing is wrong, he is right
- Bones cannot protect organs
- Ribs also protect organs, like the heart and lungs

Answer key

For grown-ups. Fold this page away before handing over the rest.

Skull · Your skull is like a hard helmet that keeps your brain safe.
Support, protection, movement · Your skeleton holds your body up, protects your organs, and works with muscles so you can move.
True · Muscles connect to your bones so they can pull them and make you move.
They pull on the bone · Muscles pull on the bones in your arm to bend it at the elbow.
Your heart and lungs · Your ribs curve around your chest like a cage, keeping your heart and lungs safe.
3 · The skeleton has three main jobs: support, protection, and movement.
Her muscles · Muscles do the pulling work whenever you move, so they can feel tired or sore afterward.
Ribs also protect organs, like the heart and lungs · Ribs protect organs too. They guard your heart and lungs, just as the skull guards your brain.