Water is vital to life on our planet. Most of Earth's water supply is in the
A) oceans.
B) ice caps.
C) rivers, lakes, and streams.
D) ground.
Answer: A
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It is easier to significantly alter the earth's CO2 balance than its O2 balance because
A) CO2 is a trace molecule in the atmosphere whereas O2 is not. B) it is so much easier to produce CO2. C) CO2 is a highly reactive molecule whereas O2 is inert. D) CO2 is an inert molecule whereas O2 is highly reactive. E) CO2 is a very unstable molecule whereas O2 is stable.
A cork floats in an inverted jar sitting on a cart, as shown in the left diagram below. If we suddenly accelerate the cart to the right (as shown in the right diagram) what will the cork do:
A. Lean backward B. Remain vertically floating directly above the base C. Lean forward D. Sink E. Explode
In the atmosphere, the intensity of scattered sunlight of longer wavelength is greater than that of shorter wavelength
a. True b. False Indicate whether the statement is true or false
An object is placed at the center of curvature
of a concave mirror. The object distance is a) zero. b) shorter than the focal length. c) the same as the focal length. d) twice the length of the focal length.