| bacteria |
microscopic organisms that often play a role in the decay of living things, the process of fermentation, and sometimes in causing disease. |
| block |
a solid piece of hard material with flat sides. |
| cheap |
having a low price. |
| daylight |
the light of the day. |
| diagram |
a drawing or plan that shows the parts of something or how the parts work together. |
| fact |
something known or proved to be true. |
| fence |
a structure used to mark off an area or to keep animals or people in or out. |
| foggy |
full of or covered by fog. |
| grip |
to grasp or hold firmly. |
| number |
a unit with a fixed value that is used to count or to tell the position of something. You can write a number as a word or a symbol, such as "nine" or "9." |
| operator |
a person whose job is to control a machine. |
| sew |
to make or repair with a needle and thread. |
| soldier |
a person who serves in the army and who is not an officer. |
| spout |
to force out in a steady stream. |
| suppose |
to assume to be true in order to make clear or to explain. |