Tropical rainforests: layers, cycles and adaptation
A rainforest is not simply a collection of trees. Its layered structure, rapid nutrient cycle and intense competition create one connected system.
Part of your national curriculum
- Human and physical geography: Understand weather and climate, including the change in climate from the Ice Age to the present
- Human and physical geography: Understand the key processes in biology relating to biomes, vegetation belts and ecosystems
Lesson overview
What you'll learn in this lesson
Understand the key processes in biology relating to biomes, vegetation belts and ecosystems
Key learning points
- • A layered forest
- • A fast nutrient cycle
- • Adaptation and interdependence
- • Reading evidence
This lesson at a glance
- 30 minutes
- 17 parts to scroll through
- 3 quick checks
- Marked quiz at the end
- Gentle pace: short sittings with pauses
Words to know
Scroll down — the lesson carries on below
Watch & discover
Part 1 of 17
Visual introductionPicture this
Tropical rainforests: layers, cycles and adaptation
A rainforest is not simply a collection of trees. Its layered structure, rapid nutrient cycle and intense competition create one connected system.
In a nutshell
Understand the key processes in biology relating to biomes, vegetation belts and ecosystems
Learning cycle
Part 2 of 17
Learning cycle 1 of 2
Part 1 · A layered forest
A short piece of teaching, then a check to make sure it has landed.
Explore the idea
Part 3 of 17
Learn
A layered forest
Emergent trees rise above a closed canopy, with an understory and dark forest floor below. Light, temperature and wind change with height, so organisms occupy different niches. Lianas climb towards light, while epiphytes grow on branches rather than investing energy in a tall trunk.
Reset break
Part 4 of 17
Pause
That's sitting 1 of 4 done
Stretch, get a drink, look out of the window. There is no timer and nothing is counting down — your place is saved, so you can come back in five minutes or tomorrow.
Explore the idea
Part 5 of 17
Learn
A fast nutrient cycle
Heat and moisture speed decomposition. Nutrients released from dead material are taken up quickly by shallow roots, so most nutrients are held in living biomass rather than the thin, leached soil. Clearing trees therefore removes the system's main nutrient store.
Quick check
Part 6 of 17
Quick check
Part 7 of 17
Reset break
Part 8 of 17
Pause
That's sitting 2 of 4 done
Stretch, get a drink, look out of the window. There is no timer and nothing is counting down — your place is saved, so you can come back in five minutes or tomorrow.
Learning cycle
Part 9 of 17
Learning cycle 2 of 2
Part 2 · Adaptation and interdependence
A short piece of teaching, then a check to make sure it has landed.
Explore the idea
Part 10 of 17
Learn
Adaptation and interdependence
Drip-tip leaves shed heavy rain, buttress roots support tall trees in shallow soil, and many flowers depend on specialist pollinators. If one population falls, seed dispersal or pollination can fall too, showing how tightly the ecosystem is linked.
Explore the idea
Part 11 of 17
Learn
Reading evidence
A climate graph for equatorial rainforest shows high temperatures throughout the year and rainfall in every month. Geographers combine this data with soil profiles, satellite images and field observations to explain the biome's distribution and condition.
Reset break
Part 12 of 17
Pause
That's sitting 3 of 4 done
Stretch, get a drink, look out of the window. There is no timer and nothing is counting down — your place is saved, so you can come back in five minutes or tomorrow.
Quick check
Part 13 of 17
Challenge round
Part 14 of 17
Game · Sort it
Which of these are true?
Drag each card into the right column. Tap a card first if dragging is fiddly.
True
Not true
Challenge round
Part 15 of 17
Game · Recall cards
Which piece of evidence best supports the claim that recent warming is human-caused?
Card 1 of 4
Mastery quiz
Part 16 of 17
Marked quiz
End of lesson quiz: Tropical rainforests: layers, cycles and adaptation
4 questions, marked with the reasoning shown. No timer.
1. Which piece of evidence best supports the claim that recent warming is human-caused?
2. Deserts cluster around…
3. On a climate graph, bars usually show…
4. Tundra vegetation is low-growing mainly because of…
Lesson round-up
Part 17 of 17
Lesson round-up
Ready when you are
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Ask LunaPart 1 of 17 · Watch & discover
How this is going
- Not looked at yet
Understand weather and climate, including the change in climate from the Ice Age to the present
- Not looked at yet
Understand the key processes in biology relating to biomes, vegetation belts and ecosystems