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Natural SciencesGrade 9Quality review 0/4

Natural Sciences — Grade 9

A complete, CAPS-aligned Grade 9 Natural Sciences course: the cells every living thing is built from, the compounds and reactions that rearrange the world's atoms, the forces and circuits behind the electricity bill, and the rock beneath South Africa that we mine for a living. Every idea comes in two modes — a precise Theory explanation and an intuition-first Visual picture — with South African examples and practice problems that carry hints and full worked solutions.

≈ 14 h 40 min6 sections · 36 lessonsNo ratings yet
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What you'll learn

  • Use a light microscope correctly, calculate total magnification, and identify the parts of plant and animal cells together with the job each part does
  • Explain how cells are organised into tissues, organs, organ systems and organisms, and account for the shape of a specialised cell in terms of its function
  • Read the periodic table, interpret and write chemical formulae, and count the atoms in a compound
  • Write word equations for the reactions of metals and non-metals with oxygen, metals with acids and acids with bases, and balance simple chemical equations using the conservation of atoms
  • Distinguish mass from weight, calculate weight from mass, and predict what happens when resistors or cells are added to series and parallel circuits
  • Calculate household electricity use in kilowatt-hours and its cost in rand, and justify practical ways of reducing it
  • Describe the structure of the lithosphere, classify rocks, outline how ore becomes metal, and weigh the benefits of mining in South Africa against its environmental and human costs

Before you start

  • Explain photosynthesis and respiration in simple terms and use the particle model of matter (Grade 8)
  • Build and describe a simple series circuit and explain static electricity (Grade 8)
  • Work confidently with whole numbers, decimals, percentages and simple formulae, and read tables and graphs

Course content

0/36 lessons
1. Cells: The Basic Units of Life4 lessons
  1. Cells and the MicroscopeLesson20 min
  2. Inside a Plant and an Animal CellLesson20 min
  3. Specialised Cells: Shape Follows JobLesson20 min
  4. From Cells to OrganismsLesson18 min
2. Compounds, Reactions and the Periodic Table4 lessons
  1. Atoms, Elements and the Periodic TableLesson20 min
  2. Compounds: Names and FormulaeLesson22 min
  3. Chemical Reactions and the Conservation of MatterLesson25 min
  4. Reactions with Oxygen, Acids and BasesLesson25 min
3. Extended Study 18 lessons
  1. Cells and the Microscope: Concept MapLesson24 min
  2. Inside a Plant and an Animal Cell: Concept MapLesson24 min
  3. Specialised Cells: Shape Follows Job: Concept MapLesson24 min
  4. From Cells to Organisms: Concept MapLesson24 min
  5. Atoms, Elements and the Periodic Table: Concept MapLesson24 min
  6. Compounds: Names and Formulae: Concept MapLesson24 min
  7. Chemical Reactions and the Conservation of Matter: Concept MapLesson25 min
  8. Reactions with Oxygen, Acids and Bases: Concept MapLesson25 min
4. Extended Study 28 lessons
  1. Cells and the Microscope: MechanismLesson24 min
  2. Inside a Plant and an Animal Cell: MechanismLesson24 min
  3. Specialised Cells: Shape Follows Job: MechanismLesson24 min
  4. From Cells to Organisms: MechanismLesson24 min
  5. Atoms, Elements and the Periodic Table: MechanismLesson24 min
  6. Compounds: Names and Formulae: MechanismLesson24 min
  7. Chemical Reactions and the Conservation of Matter: MechanismLesson25 min
  8. Reactions with Oxygen, Acids and Bases: MechanismLesson25 min
5. Extended Study 38 lessons
  1. Cells and the Microscope: RepresentationsLesson24 min
  2. Inside a Plant and an Animal Cell: RepresentationsLesson24 min
  3. Specialised Cells: Shape Follows Job: RepresentationsLesson24 min
  4. From Cells to Organisms: RepresentationsLesson24 min
  5. Atoms, Elements and the Periodic Table: RepresentationsLesson24 min
  6. Compounds: Names and Formulae: RepresentationsLesson24 min
  7. Chemical Reactions and the Conservation of Matter: RepresentationsLesson25 min
  8. Reactions with Oxygen, Acids and Bases: RepresentationsLesson25 min
6. Framework Completion: Forces, Energy and Earth4 lessons
  1. Forces and MotionLesson32 min
  2. Electricity and EnergyLesson32 min
  3. Energy Use and CostLesson32 min
  4. The Lithosphere and MiningLesson32 min