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Chapter 21

Planets, Moons & small bodies

Name the planets from the planet nearest the sun to the planet the farthest from the sun. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
Terrestrial means... Rocky, firm ground, Earth like.
When a meteoroid goes through Earth's atmosphere what is it called? Meteor
The main difference between an asteroid and a meteoroid is what? size
What is the name of the planet whose revolution is 88 days? Mercury
What evidence suggests that Mars once had water? Dry stream beds and ice caps at the poles.
What is the name of the planet with distinct rings around it made of ice and solar debris. Saturn
What is the name of the eclipse where Earth completely shadows the moon? Lunar eclipsse
What is the name of a meteor when it is still in space? Meteoroid
What is the name of the eclipse where the moon is completely covering the Sun from Earth's perspective? Solar eclipse
What planet has a storm that has lasted 400 yrs or more? Jupiter
Once a Meteoroid has entered Earth's atmosphere and hits the ground it is called what? Meteorite
The best theory on the origin of Earth's moon is what? Result of a collision with a small planet or asteroid.
The distance from the Sun to Earth can be measured in a unit which is equal to 150,000,000Km, what is the name of this unit? AU or Astronomical unit.
What does retrograde mean about a planet's rotation? rotates clockwise
Which inner planet has retrograde rotation? Venus
The length of the moons rotation and revolution is the same, how long is that? 29.5 days
The moon's relationship with Earth has the moon showing the same side to Earth at all times, what is this called? tidally locked
Why doesn't Earth have a solar eclipse every month? Moons orbit is approximately 5 degrees different from the rest of the solar system.
Why does Mercury have so much cratering and Earth doesn't? Earth has an Atmoshhere.
Created by: Christine160
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