Paper 3: Topic 8: Forests Under Threat

Question 1

Tropical rainforests are…

Answer 1

Independent ecosystems

Question 2

Effects of deforestation?

Answer 2

• fewer trees absorb carbon dioxide through photosynthesis
• soil erosion increases reducing the quality of the soil and the ability of rainforests to support large animals populations

Question 3

Describe soil in tropical rainforests

Answer 3

• decompostion happens rapidly because of climate

- nutrient rich soil

Question 4

Why can rainforests support large animal populations?

Answer 4

The vegitation is very dense, a lot of food for primary consumers

Question 5

_________ means that all the different parts of an ecosystem depend on one another.

Answer 5

Interdependence

Question 6

How have plants adapted to tropical rainforests?

Answer 6

• smooth layer of thin bark
• climbing vine/plants
• butress roots
• adapted to a particular layer

Question 7

How are animals adapted to tropical rainforests?

Answer 7

• strong limbs
• flaps of skin
• camouflaged to hide from predators
• nocturnal

Question 8

____happens quickly in tropical rainforests due to the warm and wet climate.

Answer 8

Decomposition

Question 9

What is the nutrient cycle?

Answer 9

The way nutrients move through an ecosystem

Question 10

What three ways are nutrients stored in?

Answer 10

• living organisms
• dead organic material
• the soil

Question 11

In tropical rainforests most nutrients is stored as_____

Answer 11

Biomass

Question 12

Taiga forests are _________

Answer 12

Independent ecosystems