1. Why is lo, a moon that is smaller and farther from the SUn than our own Moon,
ID: 1622710 • Letter: 1
Question
1. Why is lo, a moon that is smaller and farther from the SUn than our own Moon, still geologically active?
a, it was captured while still very hot
b. Because it was formed by a collision between a comet and Jupiter
c. Tidal stresses from jupiter continually cause lo's crust to flex keeping it from completely cooling off
d. The heat radiated from Jupiter, much hreater than the heat Jupiter receives from the Sun, heat lo, causing it to melt internally and to become geologically active.
2. Two moons are observed to each have a large amount of cratering over their surfaces. However, one of the moons has portions of its surface that are darker than other portions. What might this suggest regarding the state of geologic of these moons?
a. Both are geologically active, one with cryovolcanism, the other wiht lava plumes.
b. Both are geologically active, the lighter one with folding owing to internal heat, and the other (darker one) showing tidal stresses.
c. Neither are gelogically active and probably have never been active, since there is no evidence on the surfaces of anything that would result from geological activity.
d. The large amount of cratering suggests no current gelological activity for either moon; nothing is creating new surface to cover or erode away craters. The surface portions of different shade on one of the moons suggests past geological activity.
3. Why are cometary dust tails curved along the orbit of a comet?
a. They are more reflective than the ions so they tend to curve
b. The more massive particles of the dust tail are not accelerated as greatly by the solar wind as the lighter particles of the ion tail.
c. The ions in the ion tail repel the dust particles by static electricity
d. The dust particles move much faster than the ions so they are forced to separated into two tails.
Explanation / Answer
1) c. Tidal stresses from jupiter continually cause lo's crust to flex keeping it from completely cooling off
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