What is the world's single largest human-caused source of methane?
A. cattle belching
B. flatulence
C. pig manure
D. melting tundra
E. world's largest dams
Answer: E
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Which of the following features was not an important process contributing to the formation of Cape Cod into its present-day shape?
A) North to south longshore current
B) Glacial deposition
C) Sea level increases
D) All of these are important processes for Cape Cod's formation.
The energy of motion is known as ____
A) kinetic energy B) potential energy C) radiant energy D) specific heat
The most basic source of immediate energy for most organisms is ________
A) lipids B) starches C) glucose D) water E) amino acids
18,000 years ago, huge ice sheets called ____ covered vast areas of North America and Europe
a. ?alpine glaciers b. ?continental glaciers c. ?polar glaciers d. ?landmass glaciers e. ?mountain glaciers