| bacteria |
microscopic organisms that often play a role in the decay of living things, the process of fermentation, and sometimes in causing disease. |
| buzz |
a low noise caused by something moving fast. |
| cave |
a large, natural hole in rock or under the earth. A cave is big enough for a person or animal to enter. |
| close |
to shut. |
| daytime |
the time between dawn and evening. |
| diagram |
a drawing or plan that shows the parts of something or how the parts work together. |
| everywhere |
in every place; in all places. |
| helicopter |
a type of aircraft that is held in the air and moved along by spinning blades attached to its top side. |
| hoe |
a tool with a thin, flat blade at the end of a long handle. It is used for breaking up the soil. |
| know |
to have information in your mind that comes from what you have learned or can see. |
| mostly |
almost completely; mainly. |
| night |
the period between the time when the sun sets in the evening and when it rises in the morning. |
| scent |
a smell. |
| suddenly |
without warning, often causing surprise or fear. |
| topic |
a subject of discussion, conversation, or writing. |