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Trimester Exam
Earth Science
| Term | Definition |
|---|---|
| rotation | Earth spinning around its axis once every 24 hours, resulting in day and night. |
| revolution | The movement of Earth in its orbit around the sun resulting in a year. |
| orbit | The path an object follows as it travels around another object in space. |
| summer solstice | About June 21, when the sun is directly shining on the northern hemisphere providing the most hours of sunlight. |
| winter solstice | About December 21, when the sun is directly shining on the southern hemisphere providing the least hours of sunlight. |
| vernal equinox | About March 21, when neither hemisphere is tilted toward or away from the sun. On this day, all areas of the Earth have equal hours of day and night. |
| autumnal equinox | About September 21, when neither hemisphere is tilted toward or away from the sun. On this day, all areas of the Earth have equal hours of day and night. |
| lunar eclipse | SEM The shadow of Earth blocks out the moon light. |
| solar eclipse | SME The shadow of the moon blocks out the suns light. |
| gravity | The force that attracts all objects toward each other. |
| neap tide | A special tide that happens during 1st quarter and 3rd quarter moon with the least difference in water level between high tide and low tide. |
| spring tide | A special tide that happens during new and full moon with the greatest difference in water level between high tide and low tide. |
| ocean tide | A change in the ocean water level that typically reaches a high and low twice a day caused by the moon's gravity. |
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