The time interval between the first arrival of P-waves and the first arrival of S-waves ________ with distance from the focus of an earthquake.
A. does not change
B. cannot be measured
C. decreases
D. varies irregularly
E. increases
Answer: E
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Which of the following gives the main difference between a hurricane and a tropical storm?
A. Hurricanes are larger. B. Hurricanes have a clearly defined eye on satellite photographs. C. Wind speeds are greater in a hurricane. D. Tropical storms are more than 500 km from the Canadian coastline.
Which produces more energy, the fissioning of a single uranium nucleus or the fusing of a pair of deuterium nuclei? Why?
A) Fusing a pair of deuterium nuclei produces more energy because, unlike fission, there is no radioactive waste product. B) Fissioning a single uranium nucleus produces more energy since its mass is much greater than that of a pair of deuterium nuclei. C) Both the fissioning of a single uranium nucleus and the fusing of a pair of deuterium nuclei produce the same amount of energy since the resulting products are the same. D) Neither the fissioning of a single uranium nucleus nor the fusing of a pair of deuterium nuclei produces any net amount of energy. On the contrary, both processes require more energy than they produce.
What did Tuttle and Bowen observe in their experiment that helps geologists try to understand how magma is made?
What will be an ideal response?
Wind arrows generally back (turn counterclockwise) across a frontal zone
Indicate whether the statement is true or false