| bubble |
a ball of air or other gas inside another substance. |
| collection |
a group of things of the same type that someone has brought together. |
| copy |
something that looks exactly like another thing. |
| death |
the end of life in any living thing. |
| explore |
to travel in order to discover or search for something. |
| form |
the shape or structure of something. |
| knock |
to hit a door in order to make noise. |
| leader |
a person who directs or guides others or who has the most power in a group. |
| movie |
a motion picture; film. |
| pupil1 |
a young person who is taught by a teacher. |
| quite |
completely. |
| song |
a short piece of music for singing. |
| squad |
a small number of persons trained to work together. |
| thief |
a person who steals. |
| underground |
located, living, or taking place beneath the earth's surface. |