B(4-4) What are biomes?
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B(4-4) What are biomes?
Vocabulary• Biome
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• When you go to an area with different plants animals and climate, you are probably passing from one biome to another.• A biome is a region of the world defined by its climate and by the types of plants and animals that live there.
Biomes
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• The most important factor is climate-yearly patterns of temperature and precipitation.• The plants and animals in each biome are adapted to its climate.
What determines the location of biomes?
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1. A biome’s climate is affected by its latitude.
• The climate near the equator is warm and wet.
• Closer to the poles, climates are colder and drier. Forests change from deciduous to evergreen, and the numbers of plant and animal species decrease.
• At the highest latitudes, no trees can grow. The climate is so harsh that very few species can live there.
What affects the biome’s climate?
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1. Altitude also helps determine a biome’s climate.
• Temperature drops as altitude increases.
• At lower altitudes, were temperature are warmer, green meadows can be found.
What determines the location of biomes?
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Rainforests form in areas with enough with enough rainfall and warmth. ex. tropical rain forest, Temperate deciduous forests and taiga.
Forest Biomes
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• Large areas of Earth’s forests have been cut down to make room for farms and expanding towns.
• About 45% of prescription drugs contain ingredients that originally came from rain forest plants.
• Besides many rain forest species have not been studied yet.
Forest Biomes
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• Deserts are dry, less than 25 cm of rain each year.
• They are not always hot, some get cold at night. Some have daytime freezing temperature in winter.
• Desert plants and animals adapt to survive in desert climate.
Desert Biome
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• The tundra is a treeless region next to the polar ice caps and high on some mountains.
• Its climate is bitterly cold in winter, and gets very little precipitation. Snow covers the ground most of the year.
• Caribou and other animals migrate, while others stay such as arctic fox, wolf and ox.
Tundra Biome
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• Grasslands are biomes in which the main plants are grasses.
• They are in the middle of several continents.
• They don’t receive enough precipitation for trees to grow.
• There are 2 types:• temperate grasslands,
have hot summers and very cold winters.
• Tropical grasslands (savannas) are warm all year.
Grassland Biome
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