Tropical Rainforests-


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There has to be a lot of moisture in a Tropical Rainforest, in order for life to continue living there. On average, it must receive no less than 80 inches of rain per year. The total amount of rainfall must be high. The reason for this is because majority of Rainforests lie in "tropical zones where solar energy produces frequent rainstorms". ('The Tropical Rainforest - Questions and Answers)

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The Tropical Rainforest has "four very distict layers of trees". These are the Emergent, Canopy, Understory, and Forest Floor. The Emergent is the top layer, with the tallest trees that are spaced and not crowded together. These trees can grow to be about 240 feet at most. Because the trees in the Emergent are the tallest ones in the rainforest, they are "exposed to drying winds". To adapt to these winds, the leaves of the trees are small and pointed.

The next layer in the Tropical Rainforest is the Canopy. The trees that make up the Canopy are smaller than those who make up the Emergent, growing to be about 130 feet at most. The trees at the top of the Canopy receive some sunlight, but the trees in the lower area receive a very scarce amount. Majority of the animals in the Tropical Rainforest live at the top of the Canopy.

The third layer of the Tropical Rainforest is the Understory. This is the lower part of the Canopy. The trees here can grow to be about 60 feet in height, and consist of the wide trunks of the trees that are part of the canopy. It's very humid in the understory, because the trees are packed close together. There is scarce air movement, making the air humidity higher. The understory rarely gets any sunlight.

The last layer of trees in the Tropical Rainforest is the Forest Floor. This is the very bottom of the forest, causing it to receive "less than 1% of sunlight". Very few bushes can grow, due to the lack of sunlight. The soil is not very rich, but very thin. Termites, earthworms, and fungi, with the help of the heat, break down any dead matter into the soil. ('Tropical Rainforests')

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The Tropical Rainforest
The temperature stays around 80 degrees.
The tropical rainforest needs a hot temperature to maintain life throughout the forest.

Animal Species

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- The Leopard is one of the major animals in the Tropical Rainforest. Leopard's feed throughout the rainforest. Their coats of skin help them by camouflageing in the rainforests. Also, they hunt fish, reptiles, and mammals throughout the forest.
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Orangutan's are also a type of important species found in this type of rainforest. They are found to be always up high in trees. They are built very stong and have long, lazy arms and short legs. All orangutan's can grow up to 5 feet tall.
All animals in the forest depend on each other and rely on eachother for food. It all connects and goes into a food web.

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The Tropical Rainforests are not just a forest filled with animals, but it's a really beautiful place to go and visit!


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Scientists estimate that more than half of all the world's plant species live in tropical rain forests. A tropical rain forest has more kinds of trees than any other area in the world. Scientists have counted about 100 to 300 species in one 2 1/2-acre (1-hectare) area in South America. Seventy percent of the plants in the rainforest are trees.

About 1/4 of all the medicines we use come from rainforest plants. Curare comes from a tropical vine, and is used as an anesthetic and to relax muscles during surgery. Quinine, from the cinchona tree, is used to treat malaria. A person with lymphocytic leukemia has a 99% chance that the disease will go into remission because of the rosy periwinkle. More than 1,400 varieties of tropical plants are thought to be potential cures for cancer.

All tropical rain forests resemble one another in some ways. Many of the trees have straight trunks that don't branch out for 100 feet or more. There is no sense in growing branches below the canopy where there is little light. The majority of the trees have smooth, thin bark because there is no need to protect the them from water loss and freezing temperatures. It also makes it difficult for epiphytes and plant parasites to get a hold on the trunks. The bark of different species is so similar that it is difficult to identify a tree by its bark. Many trees can only be identified by their flowers.

To spread their seeds, the plants rely a lot on other animals. These animals pick up seeds in their fur and mouths and carry them along to other parts of the rainforest, which helps spread the seeds. Some tropical plants have the ability to pollinate themselves. They can produce latex, resins, and gums. These plants benifit ants because they provide food and shelter.

Sunlight is reflected and goes back into space by the clouds in the sky.
The tropics gain more sunlight than any other part on the surface of Earth.
Sunlight is a very important factor in the tropical rainforest's because it has alot to do with plants. The plants get their energy from sunlight. Sunlight helps many plants with their process of photosynthesis. Without sunlight, plants wouldnt make food and without plants,some animals wouldn't be able to get their food.

Climate change(global warming) due to deforestation. With the large scale burning of forests and extensive logging releases large amounts of CO2 and it interacts with other chemicals that are in the atmosphere.This creates a buildup of greenhouse gases(GHGs).The tropical rainforest has wet and dry seasons. The average temperature is 82.2 degrees in the dry season. During the wet season, the temperature 78.5 degrees. Rain forests belong to the tropical wet climate group. The temperature in a rain forest rarely gets higher than 93 °F (34 °C) or drops below 68 °F (20 °C); average humidity is between 77 and 88%

Work sited

Works Cited
1 Mar. 2008 <>.

27 Feb. 2008 <>.

29 Feb. 2008 <>.
Allaby, Michael. Tropical Forests. New York,NY: Infobase, 2006.

"Climate Graph." 29 Feb. 2008 <>.

"Different Parts of the Rainforest." 29 Feb. 2008 <>.

"Leopard." 29 Feb. 2008 < winders/jaguar.bmp(2-27)>.

"Map of the Parts of the Rainforest." 20 Feb. 2008 < maps/map/T628905A.gif (3-5)>.
Newman, Arnold. Tropical Rainforest. New York, NY: Facts on File, 1990.

"Plants." 28 Feb. 2008 <>.
Wild Cat of the World. New York,NY: Facts on File, 2002.

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