| A | B |
|---|
| lunar | a cup-like hole in the planetary body |
| mare | a huge rocky structure moving through space |
| meteor | a meteoroid passing through the earth's atmosphere |
| rille | of the moon |
| ejecta | long trenches in the surface of the moon |
| complex crater | a hole in the moon's surface that has a central peak and rays |
| teired crater | a complex crater with step-like teirs from the edge to the bottom of the crater |
| asteroid | huge dark mostly smooth areas on the moon |
| meteorite | a thin layer of small rock and dust on the surface of the moon |
| meteoroid | material thrown out of a crater upon impact |
| rays | thin lines of ejected material from the edge of a crater |
| regolith | small pieces of material that survive an impact with the moon |
| simple crater | a large object of space material that impacts on the moon's surface |
| comet | a body made up of ice and dust that travels through space |
