The direction of the jet stream is:

a. westerly.
b. easterly.
c. easterly on the Northern
Hemisphere and westerly on the Southern Hemisphere.
d. westerly on the Northern Hemisphere and easterly on the Southern Hemisphere.


a. westerly.

Environmental & Atmospheric Sciences

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What is happening in the mantle beneath a subduction zone?

a. Hot mantle rock is rising, pulling down a cold ocean slab. b. Cool mantle rock is rising, pulling down a warmer ocean slab. c. The mantle is molten and the subducting slab sinks into it. d. Relatively cool mantle rock is sinking, pulling down on a cold ocean slab. e. Hot mantle rock is sinking, pulling down on a warm ocean slab.

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What type of eruption is shown in this photograph?

A. pyroclastic column B. lava dome C. lava flow D. pyroclastic flow E. lava fountain

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Answer the following statement true (T) or false (F)

Environmental & Atmospheric Sciences