When Freddy Frog drops vertically from a tree onto a horizontally-moving skateboard, the speed of the skateboard

A. increases.
B. decreases.
C. doesn't change.
D. none of the above


Answer: B

Environmental & Atmospheric Sciences

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On a weather map of the northern hemisphere, in which of the following locations are trade winds observed?

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What are the typical products of volcanic eruptions?

a. molten rock (Lava) and pyroclastic debris b. magma c. gas and aerosols d. all of the above e. both a and c

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Consider the biosynthetic pathways by which fatty acids, steroids, carbohydrates and amino acids are synthesized. Which class of compounds has the greatest diversity of pathways?

A) amino acids B) fatty acids C) steroids D) carbohydrates E) All exhibit about the same number of pathways.

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Which of the following ecosystems accounts for 21.0% of the world marine fishery?

A) Coastal and coral systems B) Nontropical shelves C) Open ocean D) Tropical shelves E) Upwellings

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