Why does groundwater discharge to Earth's surface?
A. Earth's surface is regular, and permeability decreases with depth within Earth.
B. Earth's surface is irregular, and permeability increases with depth within Earth.
C. Earth's surface is regular, and permeability increases with depth within Earth.
D. Earth's surface is irregular, and permeability decreases with depth within Earth.
Ans: D. Earth's surface is irregular, and permeability decreases with depth within Earth.
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A tow truck exerts a 3000-N force on a car that accelerates at 2 m/s2, which means the mass of the car is
A. 1000 kg. B. 1500 kg. C. 500 kg. D. 3000 kg.
Which type of soil is likely to have white calcite nodules?
A) rain forest soil B) tundra soil C) desert soil D) agricultural-use prairie soil
Based on definition, it is more appropriate to consider which ocean as a sea?
A) The Pacific Ocean B) The Atlantic Ocean C) The Indian Ocean D) The Arctic Ocean E) The Antarctic Ocean
A major factor that allowed species to adapt to new environments and form new species through natural selection happened
a. because Pangaea began splitting apart about 135 million years ago b. about 18,000 years ago when South America and North America split apart c. about 200-250 million years ago when India and Africa split apart d. happened about 250 million years ago, because Pangaea began splitting apart e. because Asia and North America split apart 180 million years ago