About when did the extinction of the dinosaurs occur?
A) 3.5 billion years ago
B) 2 billion years ago
C) 540 million years ago
D) 65 million years ago
E) less than 1 million years ago
D) 65 million years ago
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What is the difference between volcanism on Venus and that around the ring of fire on Earth?
What will be an ideal response?
The reason that we can calculate the change in entropy of a system is that
a. entropy always decreases. b. entropy always increases. c. the entropy of the universe always remains constant. d. it depends only on the properties of the initial and final equilibrium states. e. systems always follow reversible paths.
Hollows are peculiar pits found at the center of some craters on
A) Mars. B) our Moon. C) Mercury. D) Earth. E) Venus.
The first published report that heralded the onset of the AIDS epidemic appeared in what publication on June 4, 1981?
What will be an ideal response?