| basis |
something that supports and is needed by all the other parts; starting point or foundation. |
| commissioner |
the head of a government department. |
| confine |
to keep within limits; restrict. |
| conservation |
the act of keeping and protecting from waste, loss, or destruction. |
| effect |
something produced by a cause. |
| gleam |
a small or brief flash or beam of light. |
| homeless |
having no place indoors to live. |
| lens |
a piece of clear material such as glass that bends light rays passing through it. The surface of a lens is curved to bend light rays toward or away from a central point. |
| satisfy |
to give what is wanted or needed. |
| technical |
having to do with special skills or techniques. |
| temperature |
the degree of heat or cold of an object or an environment. |
| tighten |
to make more secure or more securely fastened. |
| undertake |
to decide or start to do. |
| worldwide |
spread or happening all over the world. |
| wreck |
an action or event that results in great or total destruction. |