Book 17, Question 8
Why Is the Rainforest Floor So Dark?
The thick canopy and understory catch most of the sunlight before it reaches the ground. In some rainforests, only about 2 percent of the light makes it to the floor. That is why the forest floor is so dark.
More fun facts
- The upper canopy is a thick layer of leaves about 20 feet deep.
- It forms a roof that blocks most light from reaching the ground.
- The forest floor is the darkest layer of the rainforest.
- Only a few plants can grow there.
- Rotting leaves and other bits from above cover the floor and feed tree roots.
Sources: National Geographic, National Geographic Kids, BBC
Questions kids ask
How thick is the rainforest canopy?
The upper canopy is a thick layer of leaves about 20 feet deep.