2019-2020学年北师大版高中英语选修8教案:Unit 22《The+Eleventh+Period+Check+your+progress》
2019-2020学年北师大版高中英语选修8教案:Unit 22《The+Eleventh+Period+Check+your+progress》第3页

  animals than temperate rainforests or any other biome. In temperate rainforests, most of the animals are ground dwellers and there are fewer animals living in the forest canopy.

Where are Rainforests?

  Tropical rainforests are found in a belt around the equator of the Earth. There are tropical rainforests across South America, Central America, Africa, Southeast Asia and Australia (and nearby islands). Temperate rainforests are found along the Pacific coast of the USA and Canada (from northern California to Alaska), in New Zealand, Tasmania, Chile, Ireland, Scotland and Norway. They are less abundant than tropical rainforests.

Rainfall

  It is almost always raining in a rainforest. Rainforests get over 80 inches (2 m) of rain each year. This is about 1 1/2 inches (3.8 cm) of rain each week.

  The rain is more evenly distributed throughout the year in a tropical rainforest (even though there is a little seasonality). In a temperate rainforest, there are wet and dry seasons. During the "dry" season, coastal fog supplies abundant moisture to the forest.

Temperature

  The temperature in a rainforest never freezes and never gets very hot. The range of temperature in a tropical rainforest is usually between 75° F and 80° F (24-27° C). Temperate rainforests rarely freeze or get over 80° F (27° C).

The Soil in a Rainforest

  The soil of a tropical rainforest is only about 3-4 inches (7.8-10 cm) thick and is ancient. Thick clay lies underneath the soil. Once damaged, the soil of a tropical rainforest takes many years to recover.

  Temperate rainforests have soil that is richer in nutrients, relatively young and less prone to damage.

The Importance of Rainforests

Tropical rainforests cover about 7% of the Earth's surface and are VERY important to the Earth's ecosystem. The rainforests recycle and clean water. Tropical