science2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| the ancient Greeks knew of all of the following planets EXCEPT | Uranus
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| the sun produces energy by | nuclear fusion
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| what layer are you looking at an image of the sun | photosphere
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| the solar wind is a stream of electrically charged particles that extend outward from the sun's | corona
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| In a heliocentric system, Earth revolves around | the sun
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| what do all of the inner planets have in common | they all are small and have rocky surfaces
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| aside from Earth, which inner planet once had liquid water on its surface | mars
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| the atmosphere of the gas giant cannot escape into space because | the planets have very strong gravitational pulls
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| what do the first four inner planets have in common | they are about the same size as Earth and are made mainly of iron
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| astronomers predicted the existence and orbit of Neptune based on | Neptune's gravitational effect on the orbit of Uranus
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| the fact each planet's orbit is an ellipse was discovered by | Kepler
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| what shape are the orbits of most comets | long, narrow ellipses
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| meteoroids usually come from | comets or asteroids
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| when a meteoroid enters earth's atmosphere, it produces a streak of light called a(n) | meteor
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| scientists have discovered that life forms on earth exist | in a very wide range of condition
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| which of the inner planets does NOT show evidence of volcanic activity | Mercury
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| Saturn's rings are made up of mostly of | chunks of ice and rock
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| Uranus is different from most other planets because it | rotates on its side
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| Neptune is very similar in size and color to | Uranus
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| which is the smallest terrestrial planet | Mercury
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| true or false earth is thought to be at the center of the solar system in the g-e-o-c-e-n-t-r-i-c | true
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| true or false all of the t-e-r-r-e-s-t-r-I-a-l planets have many moons | false/ gas giants
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| true or false the sun's surface layer is the p-h-o-t-o-s-p-h-e-r-e | true
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| true or false the number of sunspots on the sun varies over a period of about 1-1- y-e-a-r-s | true
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| true or false the first four i-n-n-e-r planets are gas giants | false/ outer
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| true or false the g-a-s g-i-a-n-t-s are small, dense, and have rocky surfaces. | false/ terrestrial
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| true or false the Great Red Spot is a huge storm on S-a-t-u-r-n | false/ Jupiter
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| true or false most comets are found in either the Oort cloud or the a-s-t-e-r-o-i-d b-e-l-t | false/ Kuiper belt
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| true or false a comet or asteroid can break up to form a chunk of rock called a meteroid | true
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| the planets that are closer to the sun than Earth are Venus and ________ | Mercury
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| a meteoroid that hits earth's surface is called a(n) _______ | meteor
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| _________ discovered Jupiter's four largest moons | Galileo
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| energy is transferred from the sun's core toward the convection zone mainly in the form of _____________ | I don't know
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| the sun's ________,which looks like a halo, can usually be seen during a solar eclipse regions of a surface | corona
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| regions on the surface of mars have patterns that appear to have been made by __________ | volcanoes
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| the __________ consists of the sun, nine planets and their moons, and several kinds of smaller objects | solar system
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| mar's atmosphere is mostly _____________ | carbon dioxide
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| Jupiter's Great Red Spot is a(n)_________ larger than Earth | storm
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| _____________ is the only planet that has a lower density than water | Saturn
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