Hosted by Mrs. Dempsey 100 200 400 300 400 Solar System Sun Inner Planets Outer Planets 300 200 400 200 100 500 100.

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Row 1, Col 1

What is the difference betweenthe geocentric vs. heliocentricmodels of the universe? Who

proposed the heliocentric model?

Geocentric is Earth-centered/heliocentric is Sun-centered=Copernicus

1,2

Our sun belongs to what Galaxy? Approximately how

old is our Sun?

Milky Way / 4.6 byo

1,3

Name the terrestrialplanets in our solar

system.Place them in order from

smallest to largest.

1,4

Name three ways the outerplanets are different from the

inner planets

Size, mass, # of moons

2,1

Name the planets in orderstarting with the one

closest to the sun

MVEMJSUN

2,2

How does our Sun produce its energy?What two elements are involved?

DD

Nuclear Fusion/Hydrogen atoms combined to form heavier helium atoms

2,3

Which planet is consideredEarth’s twin? Name two ways

these two planets are alikeand two ways they differ

Venus

2,4

Each of the gas planetsare surrounded by a set of rings.What are these “rings” made of?

Particles of ice and rock

3,1

How are meteors, meteorites,and meteoroids different?

Meteorites=on Earth/Meteoroids in space/meteors=burn up in our atmosphere

3,2

What is the outer most layer of the Sun’s atmosphere called?

Why is it called this?

Corona/it looks like a crown

3,3

Which inner planet has almost no atmosphere?

Why?

Mercury/ so close to Sun causes gas molecules to move

very fast and escape and so small weak gravity

3,4

What is retrograderotation?

Name one planetthat rotates this way

Backward rotation/Venus

4,1

If an object in space is said to have anelliptical orbit, what does it mean? Name oneobject in space that has a very elliptical orbit

Elongated circle, or narrow oval/Comets

4,2

What causes the auroras in the night sky? What else canthis feature of the Sun cause

to happen?DD

Solar Winds/Solar (magnetic) storms

4,3

Name three reasonsMars would be difficult to

colonize?

Temperature, thin atmosphere=liquid H2O would turn into gas, Co2 atmosphere,

4,4

What are at least two conditionsthat a planet must possess inorder for it to be considered

a planet?

Massive enough to have become spherical, orbit the Sun, has too many “friends” in its neighborhood that it has not

captured….

5,1

Where are most comets found?How are comets different from

asteroids?Name the three parts of a comet

Kuiper belt and /or Oort cloud

Size, orbits, what they are made from

Head(coma+nucleus)Tail

5,2

What exactly is a sunspot?Name two features

that sunspot regions often create. Describe what they are.

Cooler regions on the sun’s surface/Prominences, flares

5,3

What causes Mars to haveseasons? Why is Mars

called the “red” planet?

Tilted axis and revolution around Sun / iron oxide covers its surface

5,4

Name one feature for eachof the gas planets