What happened to the nebular gas that remained from the formation of the planets and their satellites?
A) It was blown away by the solar wind.
B) It condensed to form Earth's ocean.
C) It is about 10% of the modern earth atmosphere.
D) It escaped into the vacuum of space.
A
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The earliest explanation for occluded fronts held that they formed when
A) a cold front overtakes a warm front. B) two warm fronts meet while traveling in different directions. C) a circular region of low pressure at the junction of a cold front and a warm front changed shape. D) cold air aloft undercut warm air near the surface.
________ is the world's most populous nation, home to ________ of the people living on Earth
A) The United States; one-fifth B) China; half C) The United States; half D) India; one-third E) China; one-fifth
We are currently in an ice age
Indicate whether the statement is true or false
Tropical climates
A) are humid. B) are all characterized by abundant year-round rainfall. C) are found at latitudes of 20-30 degrees. D) only exist within 50 miles of ocean. E) often have extensive deserts.