List seven land biomes that are found on Earth.

Making Inferences While excavating an area in the desert, a scientist discovers the fossils of very large trees and ferns. - What might the scientist conclude about biomes in this area?

The scientist might conclude that the area was once a forest biome and that the area received more rain in the past.

Use the graph below to answer the question . Scientists involved in a field study of a biome produced the graph above. The line represents temperature and the bars represent precipitation. Which of the following is a valid conclusion about the biome? A. The biome is a rainforest. B. The annual variation in temperature (from high to low) is about 25°C. C. The biome receives the same amount of rainfall each month. D. The biome has little plant life.

B. The annual variation in temperature (from high to low) is about 25°C.

In a savanna, the average yearly rainfall is 150 cm In a savanna, the average yearly rainfall is 150 cm. The average yearly rainfall in a desert is 25 cm. If a global climate change causes the savanna’s average yearly rainfall to decrease by 0.5 cm every year, in how many years will the savanna become a desert? A. 50 years B. 125 years C. 250 years D. 300 years

C. 250 years

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