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Lesson 2 Part 1

Earth in Space and Why Are There Seasons?

TermDefinition
Rotation A complete turn (spin)
What causes change in day and night? Earth’s rotation to the east; one side of Earth faces the sun and the other faces away
What is a time zone? Areas sharing the same time
Why are there standard time zones? If each town had its own time, it would be hard to keep track of
Orbit The path one object makes as it revolves around another
Revolution The movement of one object around another or a complete journey around the sun
Axis Imaginary line between the North and South poles that passes through Earth
Equinox Period during which hours of daylight and hours of darkness are of equal length everywhere on Earth
Solstice Period during which hours of daylight are longest in one hemisphere and shortest in the other hemisphere
What causes change in seasons? The tilt of Earth’s axis as it revolves around the sun.
What causes summer? When a hemisphere is tilted toward the sun. There is direct sunlight.
What causes winter? When a hemisphere is tilted away from the sun. There is indirect sunlight.
Created by: wcabana
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