Year 3 Science Skeletons and muscles: check-up and practice test questions
Part of the Year 3 Science skeletons and muscles chapter. Chapter overview · whole chapter on one page
Exercise 6Z Check-up
Method. Think about the frame of bones inside a body.
- Read the definition. The frame of bones inside the body is the skeleton.skeleton
- Write the answer. skeleton
Check. The skeleton is made of bones. ✓
Method. Think about the hard case around the brain.
- Read the table. The skull protects the brain.skull
- Write the answer. skull
Check. The skull is the hard case around the brain. ✓
Method. Think about the job that keeps the body standing.
- Read the jobs. Support means the skeleton holds the body up.support
- Write the answer. support
Check. A skeleton gives support. ✓
Method. Think about the snail and its soft body.
- Read the table. A snail has a soft body, with no bones inside.no
- Write the answer. no
Check. A snail has no skeleton of bones. ✓
Method. Think about the muscles that work in a pair.
- Read the table. The triceps is at the back of the upper arm.triceps
- Write the answer. triceps
Check. The triceps straightens the elbow. ✓
Method. Think about what a muscle can do.
- Read the chapter. A muscle can only pull. It cannot push.only pull
- Write the answer. false
Check. A different muscle pulls the bone back. ✓
Method. Think about the cord between a muscle and a bone.
- Read the chapter. A strong cord that joins a muscle to a bone is a tendon.tendon
- Write the answer. tendon
Check. The tendon passes the pull to the bone. ✓
Method. Look at the table of joints.
- Read the table. The elbow is a hinge joint. The shoulder is a ball and socket joint.elbow
- Write the answer. elbow
Check. The elbow moves in one direction. ✓
Method. Look at the table of bones that protect.
- Read the table. The ribs protect the heart and the lungs, not the brain.heart and lungs
- Decide. So Ruby is not right. The skull protects the brain.no
- Write the answer. no
Check. The skull protects the brain. ✓
Method. Think about the muscle, the tendon and the bone.
- Think about the muscle. A muscle contracts, so it gets shorter.contracts
- Think about the tendon. It pulls on the bone through the tendon, so the bone moves.pulls the bone
- Write the answer. Accept any sentence that says a muscle contracts and pulls on the bone through its tendon, so the bone moves.
Check. A muscle moves a bone by pulling. ✓
Total 17 marks. Allow about 17 minutes.
Exercise 6X Practice test questions
Method. Think about the frame of bones inside a body.
- Read the definition. The frame of bones inside the body is the skeleton.skeleton
- Write the answer. skeleton
Check. The skeleton is made of bones. ✓
Method. Think about the three jobs of the skeleton.
- Read the jobs. The skeleton gives support, protection and movement.support, protection and movement
- Write the answer. support, protection and movement
Check. Support holds the body up, protection guards soft parts, and movement moves the body. ✓
Method. Look at the left picture, the bent arm.
- Find the thick muscle. In the bent arm, the muscle at the front is short and thick.front
- Name it. The muscle at the front of the upper arm is the biceps.biceps
- Write the answer. biceps
Check. The biceps contracts when the arm bends. ✓
Method. Think about what a muscle can do.
- Read the chapter. A muscle can only pull. It cannot push.only pull
- Give the reason. So a different muscle must pull the bone back the other way.different muscle
- Write the answer. No. Accept any reason that says a muscle can only pull, so a different muscle pulls the bone back.
Check. Muscles pull on bones, and cannot push. ✓
Method. Find the ribs in the picture.
- Find the ribs. The ribs curve round the chest, in front of the heart and the lungs.ribs
- Read the number. The number beside the ribs is 3.3
- Write the answer. 3
Check. Number 3 is the ribs. ✓
Method. Look at the table of joints.
- Read the table. The shoulder is a ball and socket joint.ball and socket
- Say how it moves. A ball and socket joint moves in many directions.many directions
- Write the answer. Accept: a ball and socket joint, which moves in many directions.
Check. The shoulder can move the arm in many directions. ✓
Method. Think about the muscles at the front and back of the upper arm.
- Read the chapter. The biceps bends the elbow, and the triceps straightens it.biceps and triceps
- Write the answer. biceps and triceps
Check. The two muscles take turns. ✓
Method. Think about the skull and the brain.
- Read the table. The skull protects the brain.protects the brain
- Give the reason. The brain is soft, so the hard skull keeps it safe.soft brain
- Write the answer. Accept any sentence that says the skull protects the brain, which is a soft part of the body.
Check. Protection is one of the three jobs of the skeleton. ✓
Method. Look at the table of joints.
- Read the table. The shoulder is a ball and socket joint.shoulder
- Write the answer. shoulder
Check. The knee and the elbow are hinge joints. ✓
Method. Think about the jobs of the skeleton.
- Reason one. A skeleton holds the body up, which is support.support
- Reason two. A skeleton gives the body its shape, so without it the body would flop.shape
- Decide. So Mo is not right, and a person needs a skeleton to stand up.no
- Write the answer. No. Accept any two reasons, such as: a skeleton supports the body; a skeleton gives the body its shape; without bones, the soft body would flop.
Check. Without a skeleton, a body cannot stand up on its own. ✓