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. 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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