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| Definition Match |
| Match each word with it's meaning. |
| heliocentric | oval | ellipse |
| Sun-centered | ||
| inferior planets | 1000 metres or 0.62 miles | kilometre |
| a glow in a planet's ionosphere | ||
| aurora | planets closer to the Sun than Earth | light-year |
| an extra-terrestrial rock found on Earth | ||
| asteroid | the distance travelled by light in a year | meteorite |
| a bright streak of light caused by meteoroid | ||
| ionosphere | a medium-sized rocky object orbiting the Sun | comet |
| a region of charged particles in the upper atmosphere |
| Solution |
| Unit | Learning Activities | Classification | Glossary | Worksheets | Space |
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