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15 Cards in this Set

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What are the inner planets mostly made of?
rock & metal
What are most of the outer planets made of?
ice & gas
What objects orbit the earth?
moon and satellites
What objects orbit the sun?
the planets, comets, asterroids and meteorites
What does the geocentric model mean?
Earth is in the center
Sun, moon, and planets revolve around Earth in circles
What does the Heliocentric model mean?
The sun is in the center
The planets and moon revolve around in ellipses.
The geocentric model is also known as?
Ptolemaic System
The heliocentric model is also known as?
Copernican System
Use the sentence to name the planets: My Very Energetic Mother Just Served Us Nine Pizzas.
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto
What is an ellipse?
a flattened circle
What sentence helps us remember the planets order from the sun?
My Very Energetic Mother Just Served Us Nine Pizzas.
What is the largest planet?
Jupiter
What is the smallest planet?
Pluto
What does a refracting telescope pick up to form an image?
visible light
What separates the inner planets from the outer planets?
Asteroid Belt