| chemical |
a substance used in or made by a chemical process. |
| collection |
a group of things of the same type that someone has brought together. |
| dare |
to try to get someone to do something as a test of courage. |
| drown |
to die under water because of lack of air. |
| half |
one of two equal parts of a whole. |
| illness |
the state of being unwell; sickness. |
| invisible |
not able to be seen. |
| letter |
a symbol, such as "A" or "B," in writing that represents a sound in a language. |
| map |
a picture of an area of the earth or sky drawn or printed on a flat surface. |
| national |
of or having to do with the whole country, not just one part of it. |
| outstanding |
better than most others; excellent. |
| resource |
a source of help or support. |
| ridge |
a long, narrow, raised section at the top of something; crest. |
| rug |
a piece of thick material used to cover part of a floor. |
| score |
the total points earned in a game or test. |