Which of the following is an example of a numerical date?
A) The Stone Age occurred before the Iron Age.
B) John Adams was president of the United States after George Washington.
C) A meteorite impacted the Earth sixty-five million years ago.
D) Dinosaurs descended from reptiles, which descended from amphibians.
Answer: C
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Which of the following would be MOST variable at your location on a day-to-day basis?
A) Oxygen B) Nitrogen C) Carbon dioxide D) Water vapor E) Ozone
Natural evaporation processes are mainly driven by
A. Living plants B. Radiative heat from the Earth's core C. The natural instability of liquid water D. Solar energy E. Radiative heat from the ground
Which gas is the second most abundant in Earth's atmosphere?
a. oxygen b. carbon dioxide c. nitrogen d. argon e. hydrogen
Scrub vegetation refers to
A) woody plants with small, leathery evergreen leaves. B) drought resistant plants. C) a plant that survives seasonally unfavorable conditions underground. D) low shrubs and grasses with some adaptations to semiarid conditions. E) overstory (emergent layer) trees.