In the geocentric system ofthe ancient Greeks, allobjects in space revolvedaround this.
Early Astronomers for 100
Early Astronomers for 100
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What is Earth?
A Polish astronomer in the 1500’swho developed a Sun-centeredmodel of the solar system.
Early Astronomers for 200
Early Astronomers for 200
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Who is NicolausCopernicus?
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An Italian astronomerwho discovered Jupiter’sfour largest moons.
Early Astronomers for 300
Early Astronomers for 300
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Who is GalileoGalilei?
Early Astronomers for 400
Early Astronomers for 400
A German mathematician whodiscovered that the orbit of eachplanet is an ellipse.
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Who is Johannes Kepler?
Early Astronomers for 500
Early Astronomers for 500
An English scientist whoexplained why the planetsstay in orbit.
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Who is Isaac Newton?
Inner Planets for 100
Inner Planets for 100
The third planet from thesun.
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What is Earth?
Inner Planets for 200
Inner Planets for 200
The nearest planet to theSun.
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What is Mercury?
Inner Planets for 300
Inner Planets for 300
A lot of iron in the soilgives this planet a reddishcolor.
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What is Mars?
Inner Planets for 400
Inner Planets for 400
Thick, yellowish cloudsblock our view of thisplanet’s surface.
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What is Venus?
Inner Planets for 500
Inner Planets for 500
Its surface is heavilycratered like Earth’smoon.
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What is Mercury?
Outer Planets for 100
Outer Planets for 100
It has the most noticeable ringsystem made of pieces of rockand ice.
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What is Saturn?
Outer Planets for 200
Outer Planets for 200
The largest planet, characterizedby the Great Red Spot.
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What is Jupiter?
Outer Planets for 300
Outer Planets for 300
This outermost planet is smallerthan Earth’s moon.
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What is pluto?
Outer Planets for 400
Outer Planets for 400
Instead of being rocky worlds, thefour largest planets are made ofthese.
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What are gases?
Outer Planets for 500
Outer Planets for 500
The axis of this planet istipped almost parallel to itsorbital plane.
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What is Uranus?
Other Bodies in Space for 100
Other Bodies in Space for 100
Bodies of rock, ice, andgas with varied orbitsaround the Sun.
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What are comets?
Other Bodies in Space for 200
Other Bodies in Space for 200
Most of these rocky bodiesare located in a beltbetween Mars and Jupiter.
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What are asteroids?
Other Bodies in Space for 300
Other Bodies in Space for 300
A streak of light, also called ashooting star, made when afragment passes through Earth’smoon.
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What a meteor?
Other Bodies in Space for 400
Other Bodies in Space for 400
The part of a meteor that doesn’tburn up in the atmosphere andstrikes Earth’s surface.
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What is a meteorite?
Other Bodies in Space for 500
Other Bodies in Space for 500
A cloud of gas that formsaround the nucleus of a comet.
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What is the coma?
Formation of Solar System for 100
Formation of Solar System for 100
A force that causes interstellarmaterial to come togetherenough to form stars.
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What is gravity?
Formation of Solar System for 200
Formation of Solar System for 200
Most material in a rotatingcloud of gas and dust gathers inthe center, compresses, andforms this.
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What is a star?
![MCj02640760000[1]](data/images/img17.png)
Formation of Solar System for 300
Formation of Solar System for 300
A cloud of gas and dust thatforms stars and planets.
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What is an interstellarcloud/nebula?
Formation of Solar System for 400
Formation of Solar System for 400
Ms. T’s dog’s name
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Who is Watson?
Formation of Solar System for 500
Formation of Solar System for 500
Two main gases in interstellarclouds.
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What are hydrogen andhelium?