| A | B |
|---|
| angle | figure formed by two lines or flat surfaces extending from one point or line |
| beam | narrow ray of light |
| challenge | question the truth or correctness of |
| experiments | questions used to doscover something |
| kaleidoscope | tube with mirrors and bits of colored glass |
| opposite | on the other side of something else |
| reflections | images given back by a surface |
| separate | set apart; not joined |
| index | at the end of the book; helps you to locate specific information within the book |
