What is the hole in the ozone layer thought to be caused by?
A) greenhouse gases
B) carbon dioxide
C) water vapor
D) CFCs
E) acid rain
D
You might also like to view...
What is a disadvantage of using a single large lens in a telescope?
A. Different colors of white light on passing through a lens focus at different points and result in a blurred image. B. A lens has to be supported only at its edges, so the lens can sag in the middle. C. Some lens materials completely absorb short wavelengths. D. Large lenses are expensive to fabricate. E. All of these choices are correct.
A wave with a frequency of 2 Hz will have a period of ________
Fill in the blank(s) with correct word
If two protons are moved 3 times closer together, the electrical force between them is what factor of the original force?
What physical process results in the convection of thermal energy?
a. Collisions between the particles in a material. b. The movement of a fluid through a space. c. The energy exchange when a liquid becomes a gas. d. The energy transferred by electromagnetic waves traveling between objects. e. Brownian motion.