Pressurized water reactors will potentially make nuclear energy safer
Indicate whether the statement is true or false
TRUE
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Which locations consist of sediment rather than sedimentary rocks?
A) 1 and 2
B) 2 and 3
C) 3 and 4
D) 1 and 3
E) 2, 3, and 4
Present day heat flow from within Earth is twice as high as could be expected from radioactivity's contribution. This suggests that
A) more radioactivity is occurring than what scientists have accounted. B) volcanic action contributes more than scientists presently understand. C) Earth used to be much hotter. D) movement within the core causes heating by friction.
Why is RNA thought to have preceded DNA in evolution?
What will be an ideal response?
Which of the following is true about how shorelines are affected from the water side?
A. Waves can erode, deposit, or simply transport sediment. B. Most waves are generated by earthquakes and become larger upon approaching the shore. C. Tides increase and decrease the size of waves but leave sea level unchanged. D. Most erosion along shorelines occurs from offshore currents. E. None of these choices are correct.