What Causes Seasons?

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What Causes Seasons?
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We know that the reason we have day and night is
because the Earth
rotates.
Rotate means
to turn.
The Earth rotating on its ______ gives
us day and night.
axis
Earths axis is
the imaginary line that goes through the center
of the Earth.
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But guess what! Rotating isnt the only way the
Earth moves in space!
The Earth also revolves.
Revolve When one object moves around another
object
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How long does one revolution take?
It takes the Earth one year, or 365 ¼ days to
orbit the sun.
Does anyone know what orbit means?
Orbit -
The path that an object follows as it revolves
around another object.
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All over the world, people experience the four
seasons.
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Winter
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Spring
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Summer
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and fall.
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But why do we have four seasons?
Its because the Earths axis is tilted.
Take a good look at our globe. Its not tilted
like that because it looks nice. No way. Thats
the way the Earth is tilted in space.
That tilt gives us seasons!
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Look at this diagram. Notice how the Earth is
always tilted in the same direction. As the
Earth __________ the part of Earth tilted toward
the sun changes.
revolves
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During part of the year the North Pole tilts
towards the sun. This season is ________.
summer
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During another part of the year, the North Pole
points away from the sun. This season is ______.
winter