| dark |
having little or no light. |
| date |
a particular day or point in time. |
| diagram |
a drawing or plan that shows the parts of something or how the parts work together. |
| exact |
having no mistakes; correct. |
| heart |
the organ in the body that controls the flow of blood. |
| lifetime |
the length of time something is expected to work well. |
| model |
a small copy of something. |
| nervous |
feeling worry or fear about a particular thing or things. |
| question |
a sentence that asks for an answer. |
| quite |
completely. |
| really |
in fact; actually. |
| reminder |
something that causes a person to remember something. |
| speaker |
a person who uses words to say things. |
| start |
to begin activity or operation. |
| tired |
needing sleep or rest. |