Earth Science Solar Debris Test

An asteroid whose orbit crossed that of Earth

The Apollo asteroids have a perihelion distance of less than 1 A.U.

Meteoroids are mostly fragments of_______and _______

The Trojan asteroids share an orbit with________

Bright streak in the sky resulting from a small piece of interplanetary debris entering asphere

The largest asteroids are________ of kilometers in diameter.

Cometary orbits always lie close to the ecliptic plane.

One of the two groups of asteroids which orbit at the same distance from the Sun as Jupiter.

Some elements travel up to 50,000 A.U. from the Sun

Event during which many meteors can be seen per hour

Comets are the source of meteor showers.

The oldest meteorites are about__________ years old.

The component of a comet's tail is composed of dust particles,

Tails of Comets always lie along the path of the orbit

Region of the solar system, between Mars and Jupiter, where most asteroids are found

The process of sublimation is one in which a solid turns into a__________

One of the thousands of very small members of the solar system orbiting the Sun. Minor Planets.

Thin stream of ionized gas that is pushed away from the head of a comet by solar wind

The solid region of ice and dust that composes the central region of the head of a comet.

A small body, composed mainly of ice and dust, in an elliptical orbit about the Sun