Exam 19: Meteorites, Asteroids, and Comets

The ____________-type asteroids are generally found in the outer portion of the asteroid belt and are very dark.

Carbonaceous chondrites I.contain mostly iron and nickel. II.contain volatiles. III.contain chondrules. IV.are similar in composition to the S-type asteroids.

The existence of the Oort cloud cannot be confirmed observationally from Earth because the objects are too small and distant.

in the following picture, a _______ meteorite that has been cut and polished shows both rock and iron.

A bit of matter that enters Earth's atmosphere and survives to reach the ground is called

If a comet were located at the blue arrow along the comet's orbit in the picture above then the tails of the comet would point along the path of the orbit but ahead of the coma.

____________ asteroids are more common in the outer asteroid belt where it is cooler. They are darker and may be carbonaceous.

Asteroids that cross Earth's orbit and could hit Earth are known as _____________.

The inner asteroid belt is ____________ and ____________ compared to the outer asteroid belt, as shown in the following graph.

Most of the asteroids orbit the Sun in a belt between the orbits of

Long-period comets are believed to originate in the ____________.

Carbonaceous chondrites have been heated to high temperature at least once since they formed.

Meteors seen during a meteor shower appear to come from a point in the sky called the ____________________.

As shown in the following graph, an M-type asteroid is ____________ and ____________ compared to a C-type or an S-type.

A(n) ____________ is produced when Earth passes through the debris left by a comet when it passed through the inner solar system.

In this image, chondrules are present. What kind of meteorite is this

The diagram below is a plot of an asteroid's reflected brightness versus its ultraviolet minus visual color (U-V color; redder to the right and gray to the left). In this diagram, which of the asteroids is most likely an S-type asteroid

The gas tail of a comet always

-The scientists in the picture above are placing what object in an airtight bag

Compare to C-types, S-types are redder and brighter as indicated in the following graph.