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60 Cards in this Set
- Front
- Back
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Earth is just the right temperature which allows ___ ____ to exist at the surface.
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liquid water
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If it weren't for earth's significant gravity, then ____ around the planet might drift away.
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gases
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A terrestrial planet is one that is made of....
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land
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The smallest terrestrial planet is ....
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Mercury
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The planet closest to the sun is....
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Mercury
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It's hard to see Mercury from Earth because....
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it's so close to the sun
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(T/F) Mercury has virtually no atmosphere.
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True
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Right after sunset, in the western sky, you can sometimes see....
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Venus
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Which planet has a density and internal structure similar to Earth's?
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Venus
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In the time it takes Earth 12 months to go around the sun, Venus takes only ___ earth months to revolve around the sun.
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7.5
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Venus has a thick atmosphere, which makes it always look....
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cloudy.
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The average surface temperature of Venus (460 C) is hot enough to.....
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melt lead
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Venus traps heat much like Earth does -- with its gases. This is called the .....
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greenhouse effect
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We have sent many __ ___ to Venus.
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space probes
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The red planet is known as ....
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Mars
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Mars' atmosphere is more than ____% ___ _____
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95 % Carbon dioxide
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Italian atronomer, Giovanni Schiaparellli said he saw...
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long straight lines on Mars
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Scientists thing that a large amount of _____ flowed on Mars long ago.
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water
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The tilted axis of Mars and Earth causes both of them to have ___.
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seasons
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The four outer planets are ___, ____, ___, & ____
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Jupiter, Saturn, Uranus, Neptune
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The four outer planets are mostly composed of ___ and thus are not t____ planets.
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gases
terrestrial |
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The four outer planet are much ____ and more _____than Earth
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larger
massive |
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Planets that are large and made of gas are often called....
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gas giants
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Some planets, like Saturn have ____ around them - a thin disk of small particles.
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rings
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The largest and most massive planet is....
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Jupiter
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Even though it has a lot of gas, scientists think that Jupiter has a core of ___ & ____
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iron & rock
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Jupiter has a thick atmosphere made of mostly ___ & ____.
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hydrogen & helium
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In 1781, ____ became the first new planet discovered since ancient times.
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Uranus
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The axis of rotation of Uranus is tilted at about ____ degrees from vertical.
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90
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Which planet is cold and blue and has visible clouds in its atmosphere.
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Neptune
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Which planet has a solid smmaler surface and is much smaller and deser tht the other outer planets. It is considered a subplanet.
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Pluto
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I take 687 Earth days to revolve around sun and one of my days is 24 hours and 37 minutes. Who am I?
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Mars
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I am tilted, so I have seasons.
I have frozen CO2 at the ples. I have volcanoes & craters & 2 moons and a thin atmosphere Who am I? |
Mars
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I am named after the Greek god names Ares/ god of war.Who am I?
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Mars
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I am names for teh Greek God, Zeus. I take 12 Earth years to revolve around sun. 1 day = 10 hours. Who am I?
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Jupiter
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I am the largest gas planet, have a thick atmophere, more than 60 moons, and I rotate sofast that 1 day = 10 hours. Who am I?
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Jupiter
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I have a great red spot, which might be a storm. Who am I?
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Jupiter
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I am named after the Greek god Kronos and I rotate fast (1hr 34 min -= 1 day. My poles are flattened My ringsa re made of ice & rocks. I have over 32 moons. Who am I?
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Saturn
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Comets are made of mostly ____ while asteroids are made of _____
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ice & dust
rock |
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Comets form far from the Sun _____ bels & Oort Cloud, which are found beyond ___
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Kuiper
Neptune |
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I have an irregularly shaped orbit which is a very large ellipse. Who am I?
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comet
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I have an irregularly shaped orbit which is a very large ellipse. Who am I?
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comet
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When comets get close to the sun, they make a .....
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coma tail(s)
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When comets get close to the sun, they make a .....
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coma tail(s)
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Comets get their tails when....
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the sun melts ice. Solar wind blows the dust & gas.
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Comets get their tails when....
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the sun melts ice. Solar wind blows the dust & gas.
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In the sun, nuclear fusion occurs in the....
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core
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In the sun, nuclear fusion occurs in the....
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core
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In the sun's ___ zone, hot gases rise and cooler ones sink.
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convection
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In the sun's ___ zone, hot gases rise and cooler ones sink.
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convection
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In the sun, the ____ zone is between the convection zone and the core.
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radiation
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The sun's atmosphere is composed of the ____ and _____.
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chromosphere and photosphere
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Areas on the sun that are cooler are...
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sun spots
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An explosion that occurs when 2 sun spots connect is a ....
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solar flare
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A word meaning sun-centered is....
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heliocentric
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A word meaning earth-centered is....
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geocentric
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Who thought that the universe was geocentric?
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Ptolemy
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Who was the first to say that the sun was the center of our solar system?
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Copernicus
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Who gave proof of a heliocentric system?
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Galileo
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Who said that planets orbit the sun in elliptical orbits (oval shaped orbits)
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Kepler
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