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1
Question
2
A)
Which source of thermal energy can be attributed to the growth of a protoplanet?
(1 point)
radioactive decay
differentiation
gravitational compression
impact accretion
A)
Which terms correctly complete the sentence?
The Kuiper Belt is shaped like a _____, and the Oort Cloud is shaped like a _____.
(1 point)
comma with tail, bubble
donut, comma with tail
donut, bubble
bubble, donut
Question
3
Question
4
A)
Which planets are closest to the sun?
(1 point)
ice giants
terrestrial planets
gas giants
elliptical planets
A)
Which statement about the density of planets in the solar system is correct?
(1 point)
Gas giants are more dense, in part because they are so large.
Terrestrial planets are more dense, in part because they have so much more mass.
Gas giants are more dense, in part because they have so much more mass.
Terrestrial planets are more dense, in part because they are so small.
Question
5
A)
You see an object flying through the night sky. There is something blue and something whitecoming out of the object in straight lines. What are you witnessing?
(1 point)
a meteoroid
a comet
a planet
an asteroid

1 answer

Here are the answers to your questions based on the information provided:

  1. Which source of thermal energy can be attributed to the growth of a protoplanet?

    • Answer: impact accretion
      Impact accretion involves the accumulation of material from collisions, which generates thermal energy.

  2. Which terms correctly complete the sentence? The Kuiper Belt is shaped like a _____, and the Oort Cloud is shaped like a _____.

    • Answer: donut, bubble
      The Kuiper Belt has a donut-like shape, while the Oort Cloud surrounds the solar system in a more spherical or bubble-like form.

  3. Which planets are closest to the sun?

    • Answer: terrestrial planets
      The terrestrial planets (Mercury, Venus, Earth, and Mars) are the closest to the Sun.

  4. Which statement about the density of planets in the solar system is correct?

    • Answer: Terrestrial planets are more dense, in part because they have so much more mass.
      Terrestrial planets are composed primarily of metals and silicate rocks, contributing to higher density compared to gas giants.

  5. You see an object flying through the night sky. There is something blue and something white coming out of the object in straight lines. What are you witnessing?

    • Answer: a comet
      The blue and white trails indicate the presence of gas and dust being emitted from a comet as it approaches the Sun.

Feel free to ask if you have any more questions!