| A | B |
|---|
| absorb | to take in and not throw back |
| medium | a substance in which a force acts or an effect is produced |
| impulses | forces that start actions |
| reflected | to throw back light, heat or sound |
| transmitted | allowed to pass through |
| nerves | fibers that carry signals |
| rarefies | To make thin, less compact, or less dense. |
| matter | anything that takes up space and has weight |
| decode | to break it down into understandable language |
| compressed | to squeeze closely |
| molecules | Little particles that make up matter |
| vibrate | back and forth moving rapidly |
