How are the theories of seafloor spreading and continental drift supported by paleomagnetic data?
What will be an ideal response?
Answer: Certain minerals with magnetic properties will align themselves with the earth's magnetic field. Studying the direction of this alignment has revealed that the alignment varies slightly in different continents. Since it is unlikely that the earth's north and south poles are moving randomly, it supports the idea that the continents are moving.
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Plate tectonics (continental drift):
A) is probably responsible for some climatic changes that occur on a time scale of thousands of years. B) may be a key factor in explaining the cooling trend since the 1940s. C) may help us better understand the cause of the Ice Age.
Tall grasses with a few scattered trees describe a(n) ____________________ climate or type of vegetation biome
Fill in the blank(s) with correct word
Describe how the wind blows around highs and lows aloft and near the surface (a) in the Northern Hemisphere and (b) in the Southern Hemisphere
What will be the ideal response?
If greenhouse emissions continue to accumulate in the atmosphere at the current rate over the next century, it is predicted that global temperatures will rise by ________
A) 10°C B) 5°C C) 3°C D) 1°C E) 8°C