Rainforest Biodiversity

Activities to try

1. 1

   The mismatch made visible: 6% of land, over half of life

   Why it works: A tiny patch of the planet carries a staggering share of its known life; because life is so concentrated, clearing tropical rainforest destroys habitat for far more species per area than most other land, and can wipe out species found nowhere else — which is why protecting them matters so much.

   1. Study a side-by-side pair of proportion bars (or two pie slices): one bar shows all of Earth's land with only a thin sliver (~6%, about a sixteenth) marked as tropical rainforest; the second bar shows all known living species with more than half marked as living in tropical rainforests.
   2. Describe in your own words the mismatch you see between the land share and the species share.
   3. Explore a drill-down (tap or reveal) that zooms the sliver to a single hectare of Amazon, with a caption presenting the often-cited illustration that it can hold more kinds of tree than all of northern Europe (authoritative sources confirm hundreds of tree species per hectare), and reveals example species — toucan, jaguar, poison dart frog — plus a note that many more species (especially insects) are still undiscovered.
   4. Drag a shadow across the small green land sliver and watch the rainforest part of the species bar light up, showing how many known species depend on that small area; then explain why harming even part of it puts the homes of many species at risk (this is a model of concentration, not an exact count of species lost).
2. 2

   Estimate then reveal: predict the species share

   Why it works: Learners may underestimate how concentrated rainforest biodiversity is; committing to a prediction first is intended to make the true disproportion more memorable and surprising, though this prediction effect is a design hypothesis rather than a verified outcome.

   1. Before seeing the answer, predict what share of the world's known species live in tropical rainforests — for example by setting a slider or writing a percentage.
   2. Reveal the actual figure (over half, i.e. >50%) shown against the fact that tropical rainforests are only about 6% of land, and compare it with your guess.
   3. Say whether the real figure was higher or lower than you expected, and explain what surprised you.
3. 3

   What 'biodiversity' really means, and why loss is irreversible

   Why it works: Biodiversity means the VARIETY of different species, not just the number of animals; many tropical rainforest species are endemic (found nowhere else), so clearing their only habitat can wipe those species out entirely — this is why protection is a priority.

   1. Answer the diagnostic prompt: 'Rainforests cover only about 6% of Earth's land. If they're such a small slice of the planet, why do scientists say protecting them matters so much for life on Earth? Tell me why, and then tell me what biodiversity actually means here.'
   2. Decide whether 10,000 animals that are all the same species would count as high biodiversity, and justify your answer.
   3. Explain why we can't simply recreate a cleared rainforest's species somewhere else.
   4. Write a short justification linking the 6%-of-land to the >50%-of-species figure and using it to argue for conservation priority.