Phil tosses a ball horizontally from a rooftop. One second after leaving his hand the ball's vertical component of velocity is about
A. 20 m/s.
B. 10 m/s.
C. 14 m/s.
D. 5 m/s.
Answer: B
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The Mesozoic is known as the Age of Reptiles because
a. no mammals had yet evolved. b. no birds had yet evolved. c. Paleozoic invertebrates had all gone extinct. d. reptiles were highly diverse and filled many niches. e. amphibians evolved into small body sizes.
What is a major difference between the phosphorus cycle and the water, carbon, and nitrogen cycles?
A. The phosphorous cycle is much faster than the others. B. The phosphorous cycle does not include the atmosphere but the others do. C. The phosphorous cycle makes use of living organisms but the others do not. D. The phosphorous cycle is able to create new energy. E. The phosphorous cycle has not been impacted by human activity.
Continental locations attain their maximum temperature later in the summer than do marine locations, due to the differential rates at which land and water are heated
Indicate whether the statement is true or false
Which of the following provide scientists with evidence that Earth's interior has distinct layers?
A. Mapping of the deep ocean floor. B. Differences in gravity within Earth's interior. C. Behavior of seismic waves traveling through Earth's interior. D. The effect of the Moon on Earth's tidal forces and solid rock. E. Drilling of deep oil and gas wells.