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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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.
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.