Exam 19: Meteorites, Asteroids, and Comets

The ____________ is a disk-shaped cloud of icy bodies believed to extend from about 40 AU (the orbit of Pluto) out to 100 AU. It is believed that most short-period comets originate from this region.

The meteorite shown is black most likely because of friction with the air, which heats the meteoroid as it passes through Earth's atmosphere.

What evidence do we have that some asteroids have surfaces modified by geological processes

A(n) ____________ is a stony meteorite that contains no chondrules and no volatiles. They appear to have been melted after they formed and resemble solidified lavas.

Where is the Sun located in the following photo

The iron meteorites

The density of Comet Halley was found to be about 0.2 g/cm3. This implies that Comet Halley

Iron meteorites are the most common to be found because of ________________.

____ are round bits of glass found in some stony meteorites.

How does the dirty snowball theory explain some of the observed characteristics of comets and how may this description not be correct

Explain how the impact of a large comet may have caused the extinction of the dinosaurs.

What observational evidence do we have that some meteors are caused by debris from comets

Which type of object caused the crater

-When Earth passes through the orbit of a comet as shown in the picture above, what is commonly seen on Earth

The appearance of the cut and polished meteorite shown above is due to a Widmanstätten pattern.

Carbonaceous chondrites are meteorites that have

The tail on the right side of the photo is the dust tail.

Iron meteorites are rare to observe as meteoroids near Earth.

The meteors in meteor showers are believed to be the debris left behind in comet orbits.

Explain how chondrules form and how we know they exist.