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52 Cards in this Set
- Front
- Back
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The model of the universe where the Earth is the center is called a ________ model
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Geocentric
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The path that a planet takes around the sun is called its.......
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Orbit
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The laws of gravity and motion were created by .....
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Newton
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He discovered that the planet's orbits were elliptical.
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Kepler
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Which of the inner planets has retrograde rotation compared to the other inner planets?
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Venus
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What astronomer was the first to map the moon's surface; he also saw the moon's of Jupiter.
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Galileo
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Which of the planets is closest to the sun in its orbit?
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Mercury
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The atmosphere of Mars is made mostly of what gas?
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Carbon dioxide
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Which of the inner planets is called Earth's twin?
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Venus
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The Heliocentric model of the universe was developed by.....
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Copernicus
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Which inner planet is covered with such a dense cloud layer that its surface is not visible?
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Venus
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What is the shape of the planets' orbits?
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Ellipses
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These people could predict eclipses of the moon and marked its phases thousands of years ago.
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Mesopotamians
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The study of the stars and planets and how they affect the lives of people is called.....
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Astrology
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According to Ptolemy, the center of the universe was the .....
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Earth
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The tail of a comet is made of ions and .....
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dust
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Mercury is very hot during its daytime because of ....
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its closeness to the sun
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Which two planets have an atmosphere that is over 90% carbon dioxide?
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Venus and Mars
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What do you call a meteor before it enters the Earth's atmosphere?
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meteoroid
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What is the name of the force that holds all the solar systems members in orbit around the sun?
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gravity
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What do we call an orbit around the sun that is very elliptical?
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eccentric
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What is the "great red spot?"
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A storm on the surface of Jupiter
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How was information about the outer planet sent back to Earth?
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Voyager
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The methane in Uranus' atmosphere causes it to be what color?
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Blue-green
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Why is Mars called the red planet?
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Its soil has a lot of the mineral iron oxide
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what are Saturn's rings made from?
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particles of dust and chunks of rocks and ice
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What do scientists hope to learn by studying the composition of meteorites?
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the early history of the solar system
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Which planets are considered "twins"
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Earth/Venus
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This astronomer was the first to use a telescope to map the surface of the moon.
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Galileo
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What are the two main gases of the outer planets?
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hydrogen and helium
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What do we call the area of the solar system where comets are made?
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Oort cloud
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Which planet has such a low density that it will float in water?
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Saturn
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Which planet is tipped on its axis over 90 degrees?
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Uranus
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Which planet's day is longer than its year?
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Venus
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which planet's Latin name is Terra Firma?
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Earth
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This planet has the largest ring system.
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Saturn
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This planet is called the red planet.
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Mars
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This planet has a very eccentric orbit so that for several years it was the 8th planet from the sun instead of the 9th.
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Pluto
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The large gas planets are given the name...
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Jovian
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The smaller inner planets are given this name because of what they are made.
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Terrestrial
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What does the term "retrograde" mean?
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backwards
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The only planet to show any signs of life is.....
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Earth
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Asteroids are located between what two planets?
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Mars and Jupiter
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What makes up a comet?
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large chunk of ice, dust, frozen gases, and rock fragments
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What is a meteorite?
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a meteor that hits the Earth's surface
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How many tails does a comet have?
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two
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From what are the two tail of a comet made?
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one is made from dust
one is made from ions |
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Which two inner planets have an atmosphere that allows for a greenhouse effect?
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Earth and Venus
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He measured the circumference of the earth by angles and shadows over 2000 years ago.
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Eratosthenes
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The turning of a planet on its axis which causes day and night is called.....
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Rotation
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Which astronomer developed the heliocentric model of the universe?
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Copernicus
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what is the source of the light that we see from the planets?
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reflected light from our sun
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