Glossary of Earth Science Chapter 27 Solar System

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Which are the inner planets and why are they called that?
Mercury, Venus, Earth, Mars - they are inside the asteroid layer.
How are the inner planets alike? Why are they called terrestrial?
They are all earthlike with a rocky crust, dense mantal and very dense core.
What are the outer planets? Why are they called that?
Jupiter, Saturn, Neptune, Uranus and Pluto
Describe the outer planets.
They are gaseous, the first 4 are much larger than the inner planets, the outer layer has hydrogen and they all have ring systems.
Which planet is closest t o the sun? Which is farthest?
Mercury is closet, Pluto is farthest.
How much closer to the sun is Venus than Earth?
venus=68-69 million miles
earth = 91 - 95 million miles
How much closer to the sun is Earth than Mars?
Earth - 91-95 miles
Mars 128-155 million miles
What is the largest planet? What is the smallest planet?
How does the combined number of moons of the inner planets compare to the combined number of moons of the outer planets?
of the inner planets only Earth and Mars have moons. All of the outer planets have moons, some of which are very large.
What characteristics of earth make it capable of supporting life?
atmosphere, water, carbon
What characteristics of the Jovian planets are similar to Jupiter?
large, gaseous, has rings and moons.
What characteristics of Venus are similar to those of Earth's?
diameter, mass and gravity
Would you expect Venus or Saturn to have a longer period of revolution? why?
Saturn because it is farther from the sun.

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