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Ch. 9 and 10 Vocab
| Question | Answer |
|---|---|
| polllution | any harmful substance that affects Earth's land, air, or water |
| recycling | the processing of certain materials to be used again |
| disposal | getting rid of something |
| environment | all the living and nonliving things in an area |
| natural resource | something that is found in nature and is valuable to humans |
| conservation | the act of saving, protecting, or using resources wisely |
| rotate | to turn or spin |
| Sun | the star closest to Earth |
| day/night cycle | the repeating pattern of day and night that occurs every 24 hours |
| axis | an imaginary line through Earth from the North Pole to the South Pole |
| apparent motion | when an object in space seems to move even though it is Earth that is moving |
| shadow | a dark shape that is made when a source of light is blocked |