What is the world's fastest growing way to produce electricity?
A. hydroelectric energy
B. solar cells
C. geothermal energy
D. nuclear energy
E. hydrogen cells
Answer: B
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In the Early Cambrian, there was a great diversity of fauna that represented many phyla that exist
today. Indicate whether the statement is true or false.
The Hadley cell is an example of a
A) microscale circulation B) thermally direct circulation C) synoptic scale circulation
The southern part of the Aral Sea has lost 90% of its volume of water, destroying wetlands and eliminating large numbers of bird and mammal species.
Answer the following statement true (T) or false (F)
If an electric charge is shaken up and down,
A) sound is emitted. B) light is emitted. C) electron excitation occurs. D) a magnetic field is created. E) its mass decreases.