Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

D - Science - Ch 16

Comets, Asteroids & Meteors

Where do comets originate? Kuiper belt and Oort cloud
Where do asteroids originate? leftover pieces of the early solar system, mostly found between the orbits of Mars and Jupiter
Where do meteoroids originate? comets or asteroids
What size are comets? about as large as a mountain, excluding the tail
What size are asteroids? 3 are more than 300 km across, but most are less than 1 km in diameter
What size are meteoroids? smaller than comets or asteroids
What is the composition of a comet? ice, dust, or small rocky particles
What is the composition of an asteroid? rock
What is the composition of a meteoroid? rock or dust
What are comets? loose collections of ice, dust, and small rocky particles with orbits that are usually very long, narrow ellipses
What are the three main parts of a comet? nucleus, coma & tail
What forms a comet’s tail? gas and dust
How long can a comet's tail be? more than 100 million kilometers long
What are asteroids? rocky objects revolving around the sun that are too small and too numerous to be called planets
Where is the asteroid belt? lies between the orbits of Mars and Jupiter
What happened when one or more asteroids collided with Earth about 65 million years ago? the atmosphere was filled with dust and smoke, which blocked out sunlight around the world and scientists hypothesize that many species of organisms, including the dinosaurs, became extinct
What is a meteoroid? a chunk of rock or dust in space
What is a meteor? a streak of light caused by the burning up of a meteoroid in the atmosphere
What is a meteorite? a meteoroid that has passed through the atmosphere and hit Earth’s surface
Where do meteoroids come from? usually come from comets or asteroids
What caused the craters on the moon? the impact of meteoroids
Created by: lprinke