Roll a bowling ball off the edge of a table. As it falls, its horizontal component of motion
A) decreases.
B) remains constant.
C) increases.
B
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Which of the following is evidence that Earth's history is not short?
A. rates of seafloor spreading compared to the width of the Atlantic Ocean B. thousands of isotopic ages measured by different methods C. millions of layers of light- and dark-colored sediment that record yearly cycles D. a 4-billion-year age on a rock in Canada E. All of these choices are correct.
How do the effective radiating temperatures determined in part (b) compare with the value for Earth, and why is this result surprising?
What will be an ideal response?
Some flea beetles escape from a ship and fly to a small island covered with grass but with no trees or beetle predators. As the beetles feed, they destroy all the grasses
But with abundant food, the beetle population soars, doubling in size every month. After about a year, the population crashes as thousands of beetles have destroyed almost all of the plants, and there is little left to feed the large population. This scenario best illustrates ________. A) the fact that the beetles have strong competition from other species for food supply B) a population that has stabilized near its carrying capacity C) exponential growth followed by a population crash D) constant growth followed by equilibrium
What name is used from the gap between the tip of a nerve cell and its target?
A) axon B) dendrite C) synapse D) vesicle