UNIT OVERVIEW

This revision unit helps you review the main ideas from Term 4: Planet Earth and Beyond.

What this unit covers:

• Earth's systems and the lithosphere (the rocky outer layer of Earth)
• The rock cycle (how rocks form, change, and form again)
• Mining and mineral resources in South Africa
• The atmosphere (the air around Earth) and the greenhouse effect
• The birth, life, and death of stars

How to use this revision:

Work through each lesson in order. Check your answers against the model answers provided. If you get something wrong, go back and re-read that section before moving on.

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