Question

use the text to compare and contrast comets and asteroids.
asteroids and comets orbit the sun just as earth does, but what are they? both asteroids and comets are relics left over from the beginning of our solar system. an asteroid is an object made up of rocks and minerals, while comets consist mostly of ice, along with rock and some hydrocarbons. another significant difference between the two objects is size. comets range from about six to twenty - five miles in diameter, yet asteroids can range from the size of small rocks to more than six hundred miles in diameter! neither asteroids nor comets have enough mass to be round the way planets are, so they come in all sorts of shapes. both asteroids and comets have crashed into earth, but asteroids have left craters on earth—and they may have caused the mass extinction of dinosaurs.

Explanation:

• "Asteroids and comets orbit the sun just as Earth does" → Comets: yes, Asteroids: yes.
• "Both asteroids and comets are relics left over from the beginning of our solar system" → Comets: yes, Asteroids: yes.
• "comets consist mostly of ice" → Comets: yes, Asteroids: no.
• "asteroids can range from the size of small rocks to more than six hundred miles in diameter" → Comets: no, Asteroids: yes.
• "asteroids have left craters on Earth" → Comets: no, Asteroids: yes.

Answer:

	Comets	Asteroids
Were left over from the formation of the solar system	Yes	Yes
Are composed mostly of ice	Yes	No
Can be more than six hundred miles in diameter	No	Yes
Have left craters on Earth	No	Yes