Earth's magnetic poles appear to ________.

A. switch positions every 100 years
B. quickly move over large distances yearly
C. never move
D. slowly move around the geographic poles over decades


Answer: D

Environmental & Atmospheric Sciences

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This is used as a guide to planting and determining the approximate date for harvesting crops:

A. growing degree-days B. heating degree-days C. cooling degree-days D. harvest degree-index

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Gasoline can be separated from oil through the process of ____.

A. refining B. fracking C. gasification D. oil proving E. liquefaction

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How does the length of twilight vary from summer to winter?

What will be an ideal response?

Environmental & Atmospheric Sciences

Dry summers and winter precipitation maxima characterize this small biome is located in 5 disparate locations, typically on the west coast of continents between 30° and 40° latitude

A) Mediterranean shrubland
B) Midlatitude grassland
C) Midlatitude broadleaf and mixed forest
D) Tropical savanna

Environmental & Atmospheric Sciences