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Approximately 20% or of the surface of the Earth falls into this category.The temperatures are very low in the tundra. In the winter time they can be as low as -70 degrees. In the summer it is rarely about 40 degrees.There are lots of rocks too but not very much vegetation. There are almost no trees at all found in this particular biome.

TundraClick the arrow to return to the main menu

Annual rainfall in the desert is less than 10 inches and, in some years, may be zero.

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Click to continueThe temperature in the coral reef is usually 70 degrees to 85 degrees.Warm water temperatures are required for a coral reef to exist. That is why they are in the water that is shallow. In the deeper locations of water, the sun isnt able to shine due to the depths of it. There are many various small animals that live in all parts of the coral reef.The largest corral reef in the world is found in the Northeast of Australia. It is called the Great Barrier Reef.Coral Reef

Click the arrow to return to the main menuMountains cover about 20% of the Earth's surface and are found on all continents and in all oceans. The movement of the earth's crust by folding, breaking into large blocks, lifting upwards to form a dome, or cracking due to volcanic activity forms mountain ranges.In certain mountain ranges, the temperature could drop within about 10 minutes, a thunderstorm may come over a hill without warning, or a forest might open into a large meadow. Mountains

Click the arrow to return to the main menuSavannas are found in the lower latitudes.The largest place where you will find the savanna is in Africa. In fact, 46% of the land there is a savanna.There is both a dry and a rainy season that occur in the savannah biome. These each last for extended periods of time. As a result the supply of food can be very high at some times of the year. Then they are very low at others.There are only a few scattered trees found in the savanna. Savanna

Click the arrow to return to the main menuYou will find grasslands in the middle latitudes. Those that have oceans close by get more rain. They also have colder winters. The temperatures can be from -40 degrees in the winter to about a comfortable 70 degrees in the summer. There are two seasons here the growing season and the dormant season. During the dormant season nothing is able to grow due to the very cold temperatures.

Grasslands

Click the arrow to return to the main menuAnnual rainfall in the desert is less than 10 inches and, in some years, may be zero. Because of the extreme dryness of the desert, its colonization is limited to plants and very few animals.

Desert

Click the arrow to return to the main menuThe vegetation is so dense that little light reaches the forest floor.The tropical rain forest exceeds all the other biomes in the diversity of its animals as well as plants. Most of the animals mammals and reptiles, as well as birds and insects live in the trees.

Tropical Rainforest

Click the arrow to return to the main menuIt is a land dominated by conifers, especially spruces and firs.It is dotted with lakes, bogs, and marshes.It is populated by a limited variety of plants and animals.In North America, the moose is such a typical member that it has led to the name: "spruce-moose" biome.Before the winter sets in, many of the mammals hibernate, and many of the birds migrate south.Although the long days of summer permit plants to grow luxuriantly, net productivity is low.Taiga

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