Triton orbits in the same direction as Neptune's rotation
a. True
b. False
Indicate whether the statement is true or false
False
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Mars has the longest orbital period of all the terrestrial planets.
Answer the following statement true (T) or false (F)
The reason that the atmosphere of Venus is over 95% carbon dioxide is thought to be because:
A) Venus was much hotter than Earth when its atmosphere formed. B) the early plant life on Venus produced the excess carbon dioxide and consumed the oxygen. C) life on Earth formed earlier than on Venus. D) the part of the solar nebula where Venus formed contained more carbon dioxide than the part where Earth formed. E) Venus' Greenhouse Effect got out of control and became runaway after its oceans of sulfuric acid evaporated.
Which is lightest in weight?
A) oxygen atom B) water molecule C) electron D) hydrogen atom E) proton
A sonic boom occurs only as an airplane just reaches the speed of sound in air, but not after it increases its speed further
A) True B) False