| A | B |
|---|
| calendar | chart showing months, weeks,days, and dates of a year |
| electricity | form of energy that can produce light, heat, or motion |
| mysterious | hard to explain or understand |
| theory | explanation based on observation and reasoning |
| experiment | a trial or a test to find out something |
| almanac | It has useful information. |
| circulating | This is what library books are doing. |
| inventions | These often become everyday tools, like toasters, automobiles, and computers. |
| electricity | This runs your refrigerator and lights your house. |
| theory | Scientists use observation to help create this idea. |
