Because the early Earth was a large sphere of magma, the earliest rocks that formed here were recycled into the mantle long ago. What is the age of the oldest radiometrically dated rocks discovered on the planet?
(Or, what is the age of the oldest remaining rocks on Earth?)
A) 6,000 years old
B) 4.6 million years old
C) 4 billion years old
D) 4.6 billion years old
Answer: C
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India ____ family-planning program
a. had the world's first national b. has the world's most successful c. has the world's only national d. has the world's largest e. all of these answers
How could large-scale removal of vegetation influence the local climate of the region included in the Investigation?
A) More insolation would reach the ground, causing the ground to retain more sensible heat, causing stronger sea breezes during the day B) Less insolation would reach the ground, causing cooler temperatures and stronger temperature inversions C) The amount of insolation reaching the ground would not change, because plants and concrete have the same albedo D) All of these choices are correct.
The feature identified by Letter F is most likely:
A) the beginning of a new thunderstorm cell. B) the sign of an intense downdraft. C) in the stratosphere. D) in the mesosphere.
Mathematical applications that minimize the distortion caused by rendering a sphere on a flat surface are called map __________
Fill in the blank(s) with correct word