GenSci 704 q2
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| Do planets shine by their own light, or by reflected light? | reflected light
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| Which planet is closest to the sun? | Mercury
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| Venus has a dense atmosphere of _______ _______. | carbon dioxide
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| _____ is known as the "Red Planet." | Mars
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| Comets are made of _____ and _____. | ice
dust
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| Which planets are known as the "Jovian" planets? | Jupiter
Saturn
Uranus
Neptune
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| Which planets are known as "terrestrial?" | Mercury
Venus
Earth
Mars
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| There is a large belt of asteroids orbiting between which two planets? | Mars and Jupiter
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| A planet's axis is associated with its: -rotation -revolution | rotation
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| A planet's orbit is associated with its: -rotation -revolution | revolution
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| Why is the force of gravity lower on Mercury than it is on Earth? | Because Mercury's mass is less than Earth's.
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| The direction of rotation of ______ is backwards (or "retrograde") to the rotation of all other planets. | Venus
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| The mass and gravity of the Earth are used as a ________ of comparison with other planets. | standard
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| The two major components of the Earth's atmosphere are ______ and _______. | nitrogen
oxygen
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| Why is it unlikely that any living organism could survive on the Martian surface? ("Martian" means "Of Mars.") | Because of the ultraviolet radiation.
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| In size, Jupiter is the ________ planet in the solar system. | biggest
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| Galileo discovered ______ of Jupiter's sixteen satellites. | 4
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| The rings of Saturn consist of particles of ___________. | ice
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| The satellites of Uranus revolve around the planet in planes almost _________ to its orbit. | perpendicular
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| Why was it possible to predict the location of the planet Neptune? | because of a detailed study of Uranus and how it was affected by the location of Neptune.
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| What is unique about Pluto's orbit around the sun? _revolves opposite to all other planets _ inclined more than other planets _ most circular orbit _ most elliptical orbit | _inclined more than other planets
_most elliptical orbit
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| The numerous asteroids may have once been __________ | a planet
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| Most comets travel around the ______ in elongated ______ orbits. | sun
elliptical
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| True or false: Comets have long, indefinite life spans. | False
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| Put the nine planets in order from the sun outwards. Pluto Mars Uranus Venus Neptune Mercury Jupiter Saturn Earth | Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto.
Remember "My very excellent mother just served us nine pizzas."
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