Science at key stage 3 (Year 9)

Unit 9J: Gravity and space

Where the unit fits in

This unit builds on unit 7K 'Forces and their effects' and unit 7L 'The solar system and beyond'.

The unit relates to unit 9K 'Speeding up'.

It lays the foundation for work in key stage 4 on theories about the nature and evolution of the universe.

The historical impact of discoveries in astronomy is covered in unit 21 'Scientific discoveries' in the history scheme of work.

Sections in this unit

This unit is divided into sections. Each section contains a sequence of activities with related objectives and outcomes. You can view this unit by moving through the sections or print/download the whole unit.


	1. What is gravity?
	2. a. How does gravity change?
	3. b. How does gravity change?
	4. Checking progress
	5. How have our ideas about the solar system changed?
	6. a. What keeps the planets and satellites in orbit?
	7. b. What keeps the planets and satellites in orbit?
	8. c. What keeps the planets and satellites in orbit?
	9. Reviewing work