| bacteria |
microscopic organisms that often play a role in the decay of living things, the process of fermentation, and sometimes in causing disease. |
| bundle |
a number of things that you tie or wrap together so you can carry them. |
| cause |
something that makes a thing happen. |
| child |
a young human. |
| crowd |
a large number of people gathered together. |
| happy |
feeling glad, pleased, or comfortable. |
| jar |
a round container with a wide mouth. A jar is often made of glass and has a lid. |
| peaceful |
quiet; calm. |
| pure |
not mixed with anything else; made of only one substance. |
| rocket |
a device shaped like a tube that moves at high speed and is powered by gases that are forced out of one end. Rockets are used to send things into the air. |
| stare |
to look straight at something with your eyes open wide and not moving. |
| textbook |
a book used for teaching a particular subject. |
| traveler |
someone who goes from one place to another, especially over a long distance. |
| twice |
two times; in two instances. |
| usually |
ordinarily or most often; generally; typically. |