Tropical Rainforests - Paper 1 Flashcards

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1
Q

Why do tropical rainforest lie along the equator?

A

The sun’s rays are most concentrated at this latitude , heating moist air which rises and leads to heavy rainfall.

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2
Q

Where are the three main areas of tropical rainforest?

A

-The Amazon Basin
-Central Africa
-South East Asia.

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3
Q

What are the two main characteristics that distinguish tropical rainforests from other biomes?

A

-Climate
-Vegetation.

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4
Q

Describe the climate of tropical rainforests:

A

Warm and wet.

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5
Q

What do annual temperatures average around?

A

26°C.

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6
Q

What does annual rainfall usually exceed?

A

2,500 mm.

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7
Q

What is the typical height of trees in rainforests?

A

30 - 45 metres.

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8
Q

What are soils like in rainforests?

A

Mainly thin and poor.

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9
Q

How is there such luxuriant vegetation in rainforests if the soil quality is so poor?

A

Because of the nutrient cycle.

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10
Q

Which biome has the highest level of biodiversity?

A

Rainforests.

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11
Q

What fraction of the world’s plant species are found in rainforests?

A

2/3.

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12
Q

What fraction of the world’s known animal species are in rainforests?

A

Around 1/2.

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13
Q

What percentage of earth’s surface is covered by rainforests?

A

About 2%.

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