1. Photosynthesis and respiration
    1. Photosynthesis
      1. Energy sustains life
      2. Radiant energy to chemical potential energy
      3. Glucose storage and use
    2. Respiration
      1. Energy from food
      2. Products of respiration
    3. Summary
  2. Interactions and interdependence within the environment
    1. What is ecology?
      1. Ecological interactions
    2. Ecosystems
      1. Biotic and abiotic components in an ecosystem
      2. Ecosystem size
      3. Types of interactions
    3. Feeding relationships
      1. Feeding types
    4. Energy flow: Food chains and food webs
      1. Energy transfer
      2. Food webs
    5. Balance in an ecosystem
      1. Population growth
      2. Factors that disrupt a balanced ecosystem
    6. Adaptations
      1. What is adaptation?
      2. Adaptations in animals
      3. Adaptations in plants
    7. Conservation of the ecosystem
      1. Why should we care?
    8. Summary
  3. Microorganisms
    1. Types of microorganisms
    2. Harmful microorganisms
      1. Transmission of infectious diseases
    3. Useful microorganisms
      1. Microorganisms used by people
    4. Summary
  4. Life and Living Glossary
  5. Atoms
    1. The building blocks of matter
      1. What are atoms?
      2. Scientific models
      3. A model of the atom
    2. Sub-atomic particles
      1. Protons
      2. Neutrons
      3. Electrons
    3. Pure substances
      1. Elements
      2. Compounds
    4. Mixtures of elements and compounds
    5. Summary
  6. Particle model of matter
    1. What is the particle model of matter?
      1. What does the particle model of matter teach us?
      2. Why is the particle model of matter so useful?
    2. Solids, liquids and gases
      1. The solid state
      2. The liquid state
      3. The gaseous state
      4. Diffusion
    3. Changes of state
      1. Changes of state involve energy
      2. Melting and evaporation
      3. Condensation and solidifying
    4. Density, mass and volume
      1. Mass tells us 'how much' matter we have
      2. Volume tells us 'how much space' matter takes up
      3. Density tells us how 'tightly packed' a material is
    5. Density and states of matter
    6. Density of different materials
    7. Expansion and contraction of materials
      1. Expansion and contraction in a thermometer
    8. Pressure
      1. What is gas pressure?
      2. How can gas pressure be measured?
      3. How does heating or cooling a gas change its pressure?
      4. How does changing the volume of a gas change its pressure?
    9. Summary
  7. Chemical reactions
    1. How do we know a chemical reaction has taken place?
    2. Reactants and products
      1. A chemical reaction is a rearrangement of atoms
      2. Fermentation is a chemical reaction
      3. Chemical reactions can help us to detect certain substances
      4. Careers in chemistry
    3. Summary
  8. Matter and Materials Glossary
  9. Static electricity
    1. Friction and static electricity
      1. Sparks, shocks and earthing
      2. Van de Graaff generator
      3. Electroscope
    2. Summary
  10. Energy transfer in electrical systems
    1. Circuits and current electricity
      1. What is an electric current?
    2. Components of a circuit
      1. Cells
      2. Resistors
    3. Effects of an electric current
      1. Heating effect
      2. What are fuses?
      3. What is a short circuit?
      4. Magnetic effect
      5. Chemical effect
  11. Series and parallel circuits
    1. Series circuits
      1. Ammeter
    2. Parallel circuits
    3. Other output devices
      1. LEDs (Light-Emitting Diodes)
  12. Visible light
    1. Radiation of light
      1. Ray diagrams
    2. Spectrum of visible light
    3. Opaque and transparent substances
    4. Absorption of light
    5. Reflection of light
    6. How do we see light?
    7. Refraction of light
      1. Lenses
      2. Careers in optics
  13. Energy and Change Glossary
  14. The solar system
    1. The Sun
      1. Sunspots and the Sun's surface
    2. Objects around the Sun
      1. Mercury
      2. Venus
      3. Earth
      4. Mars
      5. Jupiter
      6. Saturn
      7. Uranus
      8. Neptune
      9. Asteroids
      10. Kuiper Belt objects
      11. Dwarf planets
      12. Comets and the Oort Cloud
    3. Earth's position in the solar system
      1. The greenhouse effect
      2. The beginnings of life
  15. Beyond the solar system
    1. The Milky Way Galaxy
    2. Our nearest star
    3. Light years, light hours and light minutes
    4. What is beyond the Milky Way Galaxy?
      1. The Observable Universe
  16. Looking into space
    1. Early viewing of space
    2. Telescopes
      1. Optical telescopes
      2. 1. Refracting telescopes
      3. 2. Reflecting telescopes
      4. SALT
      5. Radio telescopes
      6. MeerKAT and the SKA
      7. Space telescopes
  17. Planet Earth and Beyond Glossary