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Study Smart SA
Grade 7 Natural Sciences
Term 1 Study Notes · 2026
A quick note: These notes were made by a computer to help with revision. They can sometimes get things wrong, so always check against your school notes and textbook too.
1The Biosphere (Life and Living)
Key Points
  • Lithosphere, hydrosphere and atmosphere together form the biosphere.
  • All living things need air, water, food and a suitable temperature.
  • The biosphere supports ecosystems and biodiversity.
Words to Know
Biosphere — The part of Earth where life exists, including land, water and air.
Ecosystem — A community of organisms interacting with their physical environment.
Rules & Formulas
  • Sustaining life requires a balance of the three spheres.
Examples
  • A forest provides food, shelter and oxygen — showing how the lithosphere, hydrosphere and atmosphere work together.
⭐ Remember this! The biosphere is the global arena where life thrives.
2Biodiversity and Classification (5 Kingdoms)
Key Points
  • Biodiversity is the variety of all living things on Earth.
  • Scientists classify living things into groups to make them easier to study.
  • The five kingdoms are animals, plants, fungi, protists and monerans.
Words to Know
Classification — Sorting living things into groups based on shared features.
Rules & Formulas
  • Organisms in the same group share common characteristics.
Examples
  • A mushroom belongs to the fungi kingdom, not the plant kingdom.
⭐ Remember this! Classification helps us make sense of the huge variety of life.
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