What causes the greenhouse effect?
a) Atmospheric gases, such as carbon dioxide, absorb sunlight, causing the atmosphere to heat up.
b) The oceans absorb solar energy and trap heat, making the Earth warmer.
c) Greenhouse gases lead to polar ice cap melting, making the Earth warmer.
d) Sunlight is absorbed by the Earth's surface, reradiated as infrared energy, and absorbed by atmospheric gases.
e) Greenhouse gases absorb ozone, leaving the Earth unprotected from ultraviolet radiation.
D
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Which of the following are ways that individuals can support sustainable agriculture through their choices and behaviors?
a. waste less food b. eat locally grown food and meat c. waste less food and compost food wastes d. waste less food, eat less meat, compost food wastes and eat locally grown food e. use a drip system for watering in your own garden
A specific landform produced by the deposition of glacial till is known as
A) glacial drift. B) outwash. C) a moraine. D) alluvium.
Upper-level convergence
A) has no effect on convergence at any level. B) is primarily an effect in the horizontal dimension. C) does not result in pressure changes. D) is not a response to pressure gradients.
A(n) ____________________ is the percentage or number of species that go extinct within a certain period of time such as a year.
Fill in the blank(s) with the appropriate word(s).