| bacteria |
microscopic organisms that often play a role in the decay of living things, the process of fermentation, and sometimes in causing disease. |
| belong |
to have as a proper place or situation. |
| bubble |
a ball of air or other gas inside another substance. |
| build |
to make something by joining together different parts. |
| coal |
a hard black or dark brown substance that is found in the earth. People burn coal for heat and energy. |
| ill |
not healthy; sick. |
| lifetime |
the length of time something is expected to work well. |
| plank |
a length of wood thicker than a board. |
| rusty |
covered with rust; not working well. |
| shove |
to push in a rough way or without care. |
| sport |
an activity in which people compete against each other. Sports have rules and require certain physical skills. |
| surely |
certainly. |
| tale |
a story. |
| trade |
to give in return for something else; exchange. |
| trust |
to believe that someone is good, honest, or able to be depended on. |