| bacteria |
microscopic organisms that often play a role in the decay of living things, the process of fermentation, and sometimes in causing disease. |
| bookcase |
a set of shelves for holding books. |
| ceiling |
the part of a room that is over your head. |
| dam |
a wall built across a river or stream to stop the flow of water. |
| defend |
to protect from harm; guard. |
| fix |
to repair. |
| guess |
to give an answer or opinion without enough information to be certain. |
| lend |
to let someone use something that is yours. When you lend a thing to someone, you expect that person to return it to you. |
| lifetime |
the length of time something is expected to work well. |
| march |
to walk with steady, regular steps together with others. |
| recycle |
to put used things through a process that allows them to be used again. |
| rug |
a piece of thick material used to cover part of a floor. |
| speaker |
a person who uses words to say things. |
| special |
different from others; unique. |
| tap1 |
to hit with little force. |