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Space Systems 2
Key Vocabulary for Space Systems Lesson 3
| Term | Definition |
|---|---|
| Phase | the different shapes of the moon you see from Earth |
| Eclipse | when an object in space comes between the sun and a third object, it casts a shadow on the third object |
| Umbra | the very darkest part of the shadow during an eclipse, where the light from the sun is completely blocked |
| Penumbra | the area of the shadow during an eclipse where the sun is only partially blocked |
| Tide | the rise and fall of ocean water that occur approximately every 12.5 hours, and are a result from gravitational differences between Earth, the moon, and the sun |
| Spring Tide | when the gravity of the sun and moon combine to produces a significant difference between low and high tide (during new moon and full moon phases) |
| Neap Tide | when the moon, sun, and earth are at a right angle and the moon and sun's gravity is pulling in different directions to cause the least difference in high and low tide (1st and 3rd quarter moons) |
| Waxing | when the amount of light reflected/illuminated on the moon appears to grow /increase each night |
| Waning | when the amount of light reflected/illuminated on the moon appears to disappear/shrink each night |
Created by:
jbohannon
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