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Chapter 5
Earth, Moon, & Sun
Question | Answer |
---|---|
Axis | The imaginary line that passes through Earth's center and the North and South poles. |
rotation | The spinning of Earth on it's axis. |
revolution | The movement of one object around another. |
orbit | Earths path around the Sun. |
calendar | A system of organizing time that defines the beginning, length, and divisions of a year. |
solstice | The Sun appears to be farthest north of the equator once a year and farthest south once each year. |
equinox | halfway between the solstices the sun is directly over the equator, and neither hemisphere is tilted toward or away from the sun. |
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 that object. |
solar eclipse | when the moon passes between the earth and the sun, blocking the sunlight from earth. |
umbra | The very darkest part of a shadow |
penumbra | The lighter part of the moons shadow. |
tide | The rise and fall of ocean water that occurs every 12.5 hours. |
spring tide | When the Sun, Earth, and the Moon are nearly in a line during a new moon causing the greatest difference between consecutive low and high tides. |
neap tide | During the moons first quarter the Sun is at a right angle to the Moon and Earth causing the least difference between consecutive low and high tides. |
Lunar Eclipse | at a full moon when earth passes between the sun and the moon. |