Plutoids and Comets

A Dwarf Planet orbiting the Sun outside of Neptune’s orbit is called a(n) ________.

• neptoid

• Oort Cloud Object

• plutoid

• plutino

• comet

Which of the following are Dwarf Planets?

• Pluto and Eris

• Neptune and Pluto

• Eris and Uranus

• Mercury and Eris

• Uranus and Neptune

Which of the following is not an outer planet?

• Jupiter

• Pluto

• Saturn

• Neptune

• Uranus

Which Trans-Neptunian Object is largest in diameter?

• Sedna

• Makemake

• Pluto

• Eris

• Orcus

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NGSS.MS-ESS1-3

The discovery of Charon was significant because it allowed astronomers to determine the ________ and ________ of Pluto.

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NGSS.MS-ESS1-3

What is a useful result of the discovery that Charon occasionally eclipses Pluto?

• It allowed astronomers to determine the size of Pluto and Charon more accurately.

• It allowed astronomers to image surface features of Pluto.

• It showed that eclipses occur in other parts of the Solar System.

• It allowed astronomers to measure the distance between Pluto and Charon.

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NGSS.MS-ESS1-1

Which of the following is a characteristic that Pluto shares with the Jovian planets?

• None of these choices is correct.

• It is mostly composed of hydrogen and helium.

• It has a thick atmosphere.

• It has a ring system.

• All of these choices are correct.

The dwarf planet Pluto and its moon Charon are unique in the Solar Systems in that the orbital period of Charon equals the rotation period of Pluto. The synchronous rotation is the result of tidal interaction between them.

• True

• False

In the process of fluorescence, ________ is absorbed by an atom and the energy is emitted as ________.

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OFF

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NGSS.MS-PS4-1

The tails streaming from a comet's coma are caused by

• the comet's magnetic field channeling and ejecting the particles of the tail.

• radiation pressure and the particle wind from the Sun pushing them out.

• explosive forces from the hot nucleus ejecting the gas.

• the comet leaving the material behind it as it travels forward.