Practice by Topic
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Unit 1: The Living World: Ecosystems (70)
  • Introduction to ecosystems (10)
  • Terrestrial and aquatic biomes (10)
  • Primary productivity (10)
  • Carbon-nitrogen-phosphorus-and water cycles (10)
  • Trophic levels (10)
  • The flow of energy in an ecosystem and the 10% rule (10)
  • Food chains and food webs (10)
Unit 2: The Living World: Biodiversity (60)
  • Introduction to biodiversity (10)
  • Ecosystem services (10)
  • Island biogeography (10)
  • Ecological tolerance (10)
  • Natural disruptions to ecosystems (10)
  • Ecological succession (10)
Unit 3: Populations (50)
  • Generalist and specialist species (10)
  • Survivorship curves (10)
  • Population growth and resource availability (10)
  • Age structure diagrams (10)
  • Human population dynamics (10)
Unit 4: Earth Systems and Resources (60)
  • Tectonic plates (10)
  • Soil formation and erosion (10)
  • Earth's atmosphere (10)
  • Global wind patterns (10)
  • Earth's geography and climate (10)
  • El Niño and La Niña (10)
Unit 5: Land and Water Use (80)
  • The tragedy of the commons (10)
  • The Green Revolution (10)
  • Types and effects of irrigation (10)
  • Pest-control methods (10)
  • Meat production methods and overfishing (10)
  • The impacts of mining (10)
  • Urbanization and ecological footprints (10)
  • Introduction to sustainable practices including crop rotation and aquaculture (10)
Unit 6: Energy Resources and Consumption (40)
  • Energy sources and fuel types-including fossil fuels-ethanol-and nuclear power (10)
  • Global energy consumption and distribution of natural resources (10)
  • Natural sources of energy-including solar power-wind-geothermal-and hydroelectric power (10)
  • Energy conservation methods (10)
Unit 7: Atmospheric Pollution (60)
  • Introduction to air pollution (10)
  • Photochemical smog (10)
  • Indoor air pollution (10)
  • Methods to reduce air pollutants (10)
  • Acid rain (10)
  • Noise pollution (10)
Unit 8: Aquatic and Terrestrial Pollution (60)
  • Sources of pollution (10)
  • Human impact on ecosystems (10)
  • Thermal pollution (10)
  • Solid waste disposal and waste reduction methods (10)
  • Pollution and human health (10)
  • Pathogens and infectious diseases (10)
Unit 9: Global Change (60)
  • Ozone depletion (10)
  • Global climate change (10)
  • Ocean warming and acidification (10)
  • Invasive species (20)
  • Human impacts on diversity (10)