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Java Games: Flashcards, matching, concentration, and word search. |
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Chapter 18 Studying Space
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| Constellations | Sections of the sky that contain recognizable star patterns. |
| Day | The time required for Earth to rotate once on its axis. |
| Light-Year | A unit of length equal to the distance that light travels in 1 year. |
| Month | A division of the year that is based on the orbit of the moon around the Earth. |
| Year | The time required for the Earth to orbit once around the sun. |
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