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copy 3-6 graphics and 2 pages of understandable information. from the internet.
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*you have some infomation copied and one picture

copy and paste info ..10
organization ..............5
3 paragraphs............10

Total points..............25

A tropical rainforest is an ecosystem type that occurs roughly within the latitudes 28 degrees north or south of the equator (in the equatorial zone between the Tropic of Cancer and Tropic of Capricorn). This ecosystem experiences high average temperatures and a significant amount of rainfall. Rainforests can be found in Asia, Australia, Africa, South America, Central America,Mexico and on many of the Pacific, Caribbean, and Indian Ocean islands. Within the World Wildlife Fund's biome classification, tropical rainforests are thought to be a type of tropical wet forest(or tropical moist broadleaf forest) and may also be referred to as lowland equatorial evergreen rainforest.[3]

Tropical rainforests can be characterized in two words: warm and wet. Mean monthly temperatures exceed 18 °C (64 °F) during all months of the year.[4] Average annual rainfall is no less than 168 cm (66 in) and can exceed 1,000 cm (390 in) although it typically lies between 175 cm (69 in) and 200 cm (79 in).[5] This high level of precipitation often results in poor soils due to leaching of soluble nutrients.
Tropical rainforests exhibit high levels of biodiversity. Around 40% to 75% of all biotic species are indigenous to the rainforests.[6] Rainforests are home to half of all the living animal and plant species on the planet.[7] Two-thirds of all flowering plants can be found in rainforests.[5] A single hectare of rainforest may contain 42,000 different species of insect, up to 807 trees of 313 species and 1,500 species of higher plants.[5] Tropical rainforests have been called the "world's largest pharmacy", because over one quarter of natural medicines have been discovered within them.[8] It is likely that there may be many millions of species of plants, insects and microorganisms still undiscovered in tropical rainforests.
Tropical rainforests are among the most threatened ecosystems globally due to large-scale fragmentation due to human activity. Habitat fragmentation caused by geological processes such as volcanism and climate change occurred in the past, and have been identified as important drivers of speciation.[9] However, fast human driven habitat destruction is suspected to be one of the major causes of species extinction. Tropical rain forests have been subjected to heavy logging and agricultural clearance throughout the 20th century, and the area covered by rainforests around the world is rapidly shrinking.[10][11]
Tropical rainforests have existed on Earth for hundreds of millions of years. Most tropical rainforests today are on fragments of the Mesozoic era supercontinent of Gondwana.[12] The separation of the landmass resulted in a great loss of amphibian diversity while at the same time the drier climate spurred the diversification of reptiles.[9] The division left tropical rainforests located in five major regions of the world: tropical America, Africa, Southeast Asia, Madagascar, and New Guinea, with smaller outliers in Australia.[12] However, the specifics of the origin of rainforests remain uncertain due to an incomplete fossil record.

Types of tropical rainforest

Several types of forest comprise the general tropical rainforest biome:
external image 220px-Rain_Forest_Daintree_Australia.jpg
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Daintree rainforest in Queensland

  • Lowland equatorial evergreen rain forests are forests which receive high rainfall (more than 2000 mm, or 80 inches, annually) throughout the year. These forests occur in a belt around the equator, with the largest areas in the Amazon Basin of South America, the Congo Basin of Central Africa, Indonesia, and New Guinea.
  • Moist deciduous and semi-evergreen seasonal forests, receive high overall rainfall with a warm summer wet season and a cooler winter dry season. Some trees in these forests drop some or all of their leaves during the winter dry season. These forests are found in parts of South America, in Central America and around the Caribbean, in coastal West Africa, parts of the Indian subcontinent, and across much of Indochina.
  • Montane rain forests, some of which are known as cloud forests, are found in cooler-climate mountain areas. Depending on latitude, the lower limit of montane rainforests on large mountains is generally between 1500 and 2500 m while the upper limit is usually from 2400 to 3300 m.[13]
  • Flooded forests, seven types of flooded forest are recognized for Tambopata Reserve in Amazonian Peru:[14]
    • Permanently waterlogged swamp forest—Former oxbow lakes still flooded but covered in forest.
    • Seasonally waterlogged swamp forest—Oxbow lakes in the process of filling in.
    • Lower floodplain forest—Lowest floodplain locations with a recognizable forest.
    • Middle floodplain forest—Tall forest, flooded occasionally.
      • Upper floodplain forest—Tall forest, rarely flooded.Old floodplain forest—Subjected to flooding within the last two hundred years.Previous floodplain—Now terra firme, but history

The rain forest is known as the worlds largest pharmacy better than Walgreens and CVS because more than one quarter of medicines have been found and are very helpful for us and hopefully they will find or make more new medicines from the tropical forest specially for cancer......BIG TIME and there are many species and plants and animals still undiscovered in the topical forest