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Planetary Systems p2

Lessons 6-8

QuestionAnswer
A planets mass can be determined based on how fast its moons or satellites orbit it (faster = more mass)
Law of Universal Gravitation all objects in the universe have gravity and attract each other
The more mass an object has, the ___________ (more/less) its gravitational force more
the more distance between two objects, the _____ (more/less) the gravitational force is. less
Asteroids metallic, rocky objects in space
Where are most asteroids found? in the asteroid belt between Mars and Jupiter
How big are the asteroids? Most are the size of a small building, but some are much larger
What shapes are asteroids? different shapes, not many are round
What was the first asteroid observed? Ceres
When was the first asteroid observed? 1801
Comets mass of frozen gas, cosmic dust, and ice crystals
How are comets often described? dirty icebergs
How are comets shaped? Elongated, or peanut-shaped
Where are comets found? Past Neptune in the Kuiper Belt and Oort Cloud
When do comets have a tail? Comets that journey to the sun have a tail as they melt
Pieces of rock and met dislodged from comets, planets, asteroids, or moons Meteoroids
A meteoroid that enters Earth's atmosphere and burns (a shooting star) is a ___________. Meteor
A meteoroid that makes it through Earth's atmosphere and lands on the surface is a _________________. Meteorite
How are asteroids, comets, and meteoroids alike and different? (think of the Venn Diagram you created) Alike: comets & asteroids both orbit around the sun, & meteors start out in orbit; smaller objects in space Different: meteors travel fast, comets & asteroids are slower; comets are made mostly of ice, meteors & asteroids are mostly rock
Created by: smorshedi
 

 



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