Planets Study Guide Quiz

What characteristics does an object need to have to be considered a planet?

• A. It must be made of rock and metal

• B. It must orbit the Sun

• C. It must be spherical in shape

• D. It must dominate it's orbit

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Compare the sizes and composition of gas giants and terrestrial planets.

• A. Gas giants are larger and made mostly of gas, while terrestrial planets are smaller and made mostly of rock

• B. Gas giants are smaller and made mostly of gas, while terrestrial planets are larger and made mostly of rock

• C. Gas giants and terrestrial planets are similar in size, but gas giants are made mostly of gas and terrestrial planets are made mostly of rock

• D. Gas giants and terrestrial planets are similar in size, but gas giants are made mostly of rock and terrestrial planets are made mostly of gas

Which planet, other than Earth, would be best suited for humans to build a colony on? Explain why.

• A. Mars, because it has a similar atmosphere to Earth and potential resources for sustaining life

• B. Jupiter, because it is the largest planet and has abundant resources

• C. Venus, because it is the closest planet to Earth and has a similar climate

• D. Saturn, because it has beautiful rings that can be used for tourism

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Organize these options into the right categories

Groups:

(a) Planet

,

(b) Dwarf Planet

• Not largest thing in it's orbit

• Spherical

• Mostly in Kuiper Belt

• Orbits the Sun

• Dominates it's Orbit

• Also orbits sun

• Mostly Spherical

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Should humans explore other planets? Why or why not? If you think they should explore other planets, which method is best (telescope, space probes, rovers, human landings)?

• A. No, humans should not explore other planets because it is too dangerous

• B. Yes, humans should explore other planets to expand knowledge and potentially find habitable environments

• C. Yes, the best method to explore other planets is through telescopes

• D. Yes, the best method to explore other planets is through human landings

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Many people were upset when Pluto was demoted to a dwarf planet. Why do you think people were upset over the classification of a celestial object?

• A. People were upset because they believed Pluto should still be considered a planet

• B. People were upset because they thought the demotion of Pluto diminished its significance

• C. People were upset because they had emotional attachments to Pluto

• D. All of the above

Label the planets of the solar system in order of size, from largest to smallest.

• Mars, Jupiter, Uranus, Earth, Mercury, Saturn, Venus, Neptune

• Neptune, Mercury, Earth, Saturn, Jupiter, Mars, Uranus, Venus

• Jupiter, Saturn, Neptune, Uranus, Earth, Venus, Mars, Mercury

• Jupiter, Saturn, Earth, Neptune, Mercury, Mars, Venus, Uranus

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Which is the hottest planet?

• Jupiter

• Earth

• Venus

• Mercury

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Which is the coldest planet?

• Uranus

• Neptune

• Saturn

• Jupiter

(a)   has the lowest density of all planets. If it were to placed in ​ (b)   it would ​ (c)   .

• Saturn
• water
• float
• Uranus
• Jupiter
• sink
• Mercury
• space

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