Exam 19: Meteorites, Asteroids, and Comets

The impact of a large asteroid comet with Earth has been proposed to have caused the extinction of the dinosaurs. The impact site of this comet is in or near

-The above image shows a named ____________ that orbits a(n) ____________.

Most meteors come from comets, but most meteorites come from asteroids. Explain this statement.

Stony, chondrite, achondrite, and stony-iron meteorite types are classified according to their

The asteroid belt lies between planets ____________ and ____________

If a large 10-km asteroid or comet struck the Earth in the ocean floor, I.large amounts of molten rock would rain down on Earth and cause massive forest fires. II.giant tidal waves would result III.after effects would cause the deaths of most animal life on the planet. IV.thick clouds of dust would form and block out the Sun for an extended period.

The straight line tail is straight because of the ____________.

A dirty snowball description for a comet nucleus suggests that the composition is ices.

____________ asteroids are the most common and appear to be the source of the most common type of meteorite, the chondrites. They are more common in the inner belt and may be the source of stone meteorites.

After formation, an asteroid could produce an iron core and a rocky silicate mantle if it melted then

Which tail in the following photo is the gas tail