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Science · Grade 12

Choose a Biology, Chemistry or Physics Extension

One environmental story, rising carbon dioxide, is examined through three disciplinary lenses. After a shared lesson on how each science frames questions, learners take a biology extension (ocean acidification and shell-building organisms), a chemistry extension (carbonate chemistry and the logarithmic pH scale) and a physics extension (Earth's radiation balance, albedo and solar energy). Teachers may assign one strand in depth; the quiz samples all three.

  • 4 lessons
  • About 130 minutes
  • Disciplinary extensions check: 11 questions
  • Ways to answer: balance equations, choose an answer, draw a graph, type a number, place on a number line and put in order
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What learners will discover

  • Explain how biology, chemistry and physics frame different, complementary questions and evidence about the same environmental problem.
  • Biology: explain how ocean acidification affects calcifying organisms and food webs, and interpret controlled-experiment data.
  • Chemistry: use carbonate reactions and the logarithmic pH scale to explain how dissolved CO2 lowers pH and carbonate-ion availability.
  • Physics: use the radiation balance and albedo to calculate absorbed solar power, explain feedbacks, and estimate solar-panel output.

Lessons

  1. Three lenses on one problem 5 steps2 practiceabout 22 min
  2. Biology extension: acidification and shell builders 6 steps4 practiceabout 36 min
  3. Chemistry extension: carbonate chemistry and pH 7 steps5 practiceabout 36 min
  4. Physics extension: radiation balance, albedo and solar energy 7 steps5 practiceabout 36 min
  5. Disciplinary extensions check 11 questions at the end

Keep exploring

More 12th grade science

Guide for grown-ups