Which of the following statements is FALSE?
a) Io has a noticeable lack of impact craters on its surface.
b) All of the Jovian planets have a ring system.
c) The surface of Europa is completely covered by water ice.
d) Saturn has small and medium-sized moons, but no large ones.
e) Water ice predominates on Saturn's moons.
Ans: d) Saturn has small and medium-sized moons, but no large ones.
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Which of the following makes it very difficult to detect planets around other stars?
A) Planets are constantly orbiting their stars, so we don't know where to point our telescopes to see them. B) Planets are typically at least a billion times fainter than their host stars. C) Planets give off only infrared light, not visible light. D) Planets orbit too far from their stars to be detected.
A gas is placed in a container, which is immersed in an ice-water mixture as shown below
As the piston is slowly lowered, the temperature...
Because he failed to observe stellar ________, Aristotle wrongly concluded we could not be in orbit around the Sun
Fill in the blank(s) with correct word
If you pound a feather with a hammer, which one feels a greater force?
A) always the feather B) always the hammer C) The size of the force is always exactly the same on both of them. D) If the feather moves, then it felt the greater force. Otherwise the force was the same on both.