The type of wave that can travel in a vacuum is
A. sound.
B. light.
C. both of these
D. none of the above
Answer: B
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When a boulder and a pebble are dropped, the pebble falls as fast as the boulder because
A. both accelerate equally. B. both pick up speed equally. C. its ratio of gravitational force to mass is the same as the boulder's. D. air resistance is less for the pebble.
On a sunny day in winter, why does it appear to be much brighter outside on a day when there is a snowpack on the ground as opposed to a sunny winter day with no snowpack?
What will be an ideal response?
The longest subdivision of the geologic time scale is the ________
A) epoch B) eon C) era D) period
Water vapor (H2O) has a longer residence time in the atmosphere than carbon dioxide (CO2 )
Indicate whether the statement is true or false