Review for Astronomy Test for Mrs. Hagan

Question Answer
One Complete revolutin of EArth around the sun takes about ____________________ One Year (365 1/4 Days)
Which of these planets is farthest from the sun? Venus, Mars, Saturn, Jupiter Saturn
The two factors that combine to keep the planets in orbit are ________________. Gravity & Inertia
The sun provides ____________ for our solar system. Energy
The great red spot is found on ____________. Jupiter
________________ has the most complex ring system made of hundreds of ringlets. Saturn
Which of the following planets is least like the others listed in composition (what it is made of)? Neptune, Mars, Uranus, Saturn Mars
_______________ is the farthest planet from the sun. Neptune
Venus and Earth are much alike in terms of __________. Size & density
The planet closest to the sun is ___________. Mercury
Planets _____________ arouond the sun. revolve
What solar features can increase the solar wind, sometimes causing electrical power problems on Earth? solar flares
The second planet to the sun is ___________. Venus
What do all the inner planets have in common? They are small and have rocky surfaces.
Planetary orbits are shaped like ___________. Ellipses
The ________________ is the major source of solar system energy. Sun
_________________ are caused by EArth's rotation on its axis. Day and night
Earth has __________ because Earth's axis is tilted as it moves around the sun seasons
Earth is unique among the planets because of its ___________. oceans
Earth's rotation takes about _________. 24hours
__________ link different parts of sunspot regions together. Solar prominences
_____________ of a planet is best described as spinning on its axis Rotation
The sun produces energy by _________. nuclear fusion
Water is a solid, liquid and gas on ___________. Earth
What layer are you looking at when you look at a photograph of the sun? Photosphere
The solar wind is a stream of electrically charged particles produced by the sun's _________. Corona
When compared to the gases around them on the sun, ___________ are cooler. Sunspots
Two planets with similar mass and size are _______. Venus & Earth
When the north end of the EArth's axis is tilted toward the sun, North America will experience __________________. More direct rays and longer days
Uranus is different from most other planets because it ___________. rotates on its side
Methane gives _____________ their blue-green color. Uranus & Neptune
What do the outer planets have in common? They are much larger than EArth and are made mostly of gases.
Two of the inner rocky planets are ____________. (Hint: One is now the smallest planet and they begin with the same letter.) Mercury & Mars
This is the smallest planet. Mercury

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