Filtration and distillation are ____ methods for detoxifying hazardous waste.
A. physical
B. chemical
C. biological
D. natural
E. inexpensive
Answer: A
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Compared with the photons of light that shine on glass, the photons that emerge are
A. of lowered energy. B. different though identical. C. a mixture of being the same and identical. D. the same photons.
Describe four different types of weather forecasting methods and give an example of each
Lake-effect snow occurs only during the early spring
Indicate whether the statement is true or false
The howling of wind on a blustery night is believed to be caused by
a. variations in air temperature. b. winds blowing around a frozen surface. c. snowflakes striking one another but not sticking together. d. air flowing past obstructions. e. wind lifting, then lowering small objects at the surface.