Which is a unique geological feature found on Mercury's surface?
a. craters
b. lobate scarps
c. shield volcanoes
d. sinuous rilles
e. basins
b
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For what kinds of stars are the masses of stars in the H-R diagram "orderly"? For what kinds of stars are they disorderly? In other words, could you guess the mass of a star from its location (luminosity, temperature) on the H-R diagram?
What will be an ideal response?
Neptune and Uranus have a bluish tint because:
A) at their distances, the Sun appears blue, the red absorbed by dust in the ecliptic. B) they are far away and distance makes objects appear bluish. C) their atmospheres contain methane, which absorbs red light. D) their atmospheres contain hydrogen and helium. E) ammonia ice reflects blue light better than any other color.
Photosynthetic life existing on a planet farther from the Sun than the Earth would most likely be
A) smaller, less efficient at collecting solar radiation or have a faster metabolism than photosynthetic life on Earth B) identical to photosynthetic life on Earth C) larger, more efficient at collecting solar radiation or have a slower metabolism than photosynthetic life on Earth D) impossible
You hold an apple in one hand and an orange in the other. If you doubled the mass of the apple and tripled the mass of the orange, without changing the distance between them, the gravitational force between them would be
A) unchanged, because it is zero both before and after the mass alterations. B) five times larger. C) doubled. D) three times larger. E) six times larger.