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astro111n_ch8&9
Question | Answer |
---|---|
Why is Jupiter denser than Saturn? | Its higher mass and gravity compress its interior. |
Some jovian planets give off more energy than they receive because of | ongoing contraction or differentiation. |
Which lists the jovian planets in order of increasing distance from the Sun? | Jupiter, Saturn, Uranus, Neptune |
Why does Neptune appear blue and Jupiter red? | Methane in Neptune's atmosphere absorbs red light. |
Why is Io more volcanically active than our moon? | Io has a different internal heat source. |
The main ingredients of most satellites of the jovian planets are | hydrogen compound ices. |
Saturn's many moons affect its rings through | orbital resonances. |
Saturn’s rings are composed of __________. | lots of individual particles of ice and rock |
Saturn’s rings look bright because __________. | light from the Sun reflects off the material in the rings |
Which of the following statements correctly describes the motion of the particles in Saturn’s rings? | Particles in the inner rings orbit Saturn at a faster speed than particles in the outer rings. |
Jupiter nudges the asteroids through the influence of | orbital resonances. |
Can an asteroid be pure metal? | Yes, it must have been the core of a shattered asteroid. |
Did a large terrestrial planet ever form in the region of the asteroid belt? | No, because Jupiter prevented one from accreting |
How big an object causes a typical shooting star? | a grain of sand or a small pebble |
Which are thought to have formed farthest from the Sun? | Kuiper belt comets |
What does Pluto most resemble? | a comet |
According to current evidence, Pluto is best explained as ______. | a large member of the Kuiper belt |
A comet entering the inner solar system from afar will __ | form a coma and some time later form a tail |
During the time that a comet passes through the inner solar system, the comet can appear quite bright because __________. | sunlight reflects off the comet’s tail and coma |
A comet’s plasma tail always points directly away from the Sun because __________. | of pressure exerted by the fast-moving charged particles in the solar wind |
Saturn's rings | are continually supplied by impacts with small moons. |