Year 7 - Science
Biomechanics
Human skeleton and muscles
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit investigates the structure and functions of the human skeleton, including support, protection, movement, and blood cell production. Explore biomechanics, the interaction of muscles and the skeleton, and antagonistic muscles while measuring muscle force.
Lesson Summary
You will learn to calculate the moment of a force around a joint.
Key Notes
- A muscle attached to a bone exerts a force on the bone when the muscle contracts, which makes the bone move.
- Biomechanics is the study of this movement.
- A moment is the turning effect of the force when a bone pivots at a joint.
- The size of the moment when a bone pivots at a joint can be calculated.
Vocabulary To Learn
- muscle contraction: Muscle contraction is the shortening of muscles.
- force: A force is a push or a pull that acts on an object.
- biomechanics: Biomechanics is the study of how the body moves.
- moment: A moment is the turning effect of a force.
- pivot: The point around which an object can rotate is a pivot.
Common Mistakes To Avoid
- Pupils may not have encountered the moment equation in physics.
3 Quick Questions (With Answers)
1. Explain the scientific idea in this lesson using two key points.
A muscle attached to a bone exerts a force on the bone when the muscle contracts, which makes the bone move. Biomechanics is the study of this movement.
2. Define this scientific word and use it in context. 'muscle contraction'
Muscle contraction is the shortening of muscles. Include the word in a full scientific explanation, not as a single label.
3. Correct this common scientific misunderstanding.
Mistake: Pupils may not have encountered the moment equation in physics. Correction: Pupils might need extra support substituting values into the equation.
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