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24 Cards in this Set
- Front
- Back
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What size star is our sun?
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Average
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What is our sun made up of?
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hydrogen and helium
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What is the solar system?
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Earth, moon, sun, seven other planets and their satellites, and smaller things (asteroids and comets)
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Which planets are the inner planets?
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Mercury, Venus, Earth, Mars are inner
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Which planets are the outer planets?
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Jupiter, Saturn, Uranus, Neptune are outer
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Which planets are the terrestrial planets?
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Mercury, Venus, Earth, Mars are terrestrial
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Which planets are the gas giants?
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Jupiter, Saturn, Uranus, Neptune are gas
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Why do planets stay in orbit around the sun?
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Gravitational attraction
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What features do asteroids and comets both have?
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They both orbit the sun, they both have rock in them
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What features do asteroids have that comets don't?
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They can sometimes have moons, they have iron.
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What features do comets have that asteroids don't?
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They have gas and ice in them; may be the origins of the solar system; orbits can cross orbits of other planets.
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Which planet has the most moons orbiting it?
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Jupiter
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What is the Kuiper belt?
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disk-shaped zone of icy objects that lays beyond the gas giants
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What is found in the Kuiper Belt?
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Icy objects, Pluto
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What is the order of the planets from the Sun outward?
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Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.
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What is rotation of a planet?
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The spinning of a planet around its axis.
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What is revolution of a planet?
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The path the planet takes around the sun.
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What is your dog's name?
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Gracie
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What is the Sun's role in the solar system?
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Its gravity keeps the planets in orbit, and its heat helps warms some of the planets.
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What is the name of the galaxy that we are in?
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The Milky Way
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Define: Orbit
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To travel in a curved path around something else
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Define: Asteroid
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Small, solid objects that orbit the Sun.
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Define: Comet
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A mass of ice and dust orbiting the Sun.
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Define: Gravity
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The force of attraction between two objects
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