which of the following is true about science
a) In science knowledge is advanced by experiments which must be repeatable by competent observers
b) In science once something is proven as a fact, it is a fact forever as science does not change in time
c) A theory in science is just a guess about what is going on
a) In science knowledge is advanced by experiments which must be repeatable by competent observers
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On a clear night you go outside and face south and see circumpolar stars. Then you turn and face north and you see stars rising in the east and setting in the west. Where are you located on Earth?
a. equator b. a mid-latitude between the equator and the north pole c. south pole d. a mid-latitude between the equator and the south pole
Compared with air pressure on the outside, air pressure inside an inflated stretched balloon is
A) less. B) equal. C) greater. D) need more information
Evidence that a gas consists mostly of empty space is the fact that:
A. the density of a gas becomes much greater when it is liquefied B. gases exert pressure on the walls of their containers C. gases are transparent D. heating a gas increases the molecular motion E. nature abhors a vacuum
The Moon and Sun are approximately the same physical size
Indicate whether the statement is true or false