Why do we have seasons?. Two Movements of Earth Rotation: The Earth rotates on its axis One day on Earth is one rotation of the Earth. Day vs. Night Demo.

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Presentation transcript:

Why do we have seasons?

Two Movements of Earth Rotation: The Earth rotates on its axis One day on Earth is one rotation of the Earth. Day vs. Night Demo – (Globe &Flashlight)

Earth’s Revolution Earth revolves around the sun It takes the Earth 365 days to travel or revolve around the sun once.

True or False? 1.The Earth orbits the sun in a circular path? 2.Seasons are caused by the distance each planet is to the sun. 3.The Earth is closest to the sun in January. 4.Both the northern and southern hemispheres enjoy summer at the same time of year.

The Reason for the Seasons… Bill Nye The Science Guy: Q: What causes the seasons? A: Tilt of the Earth's axis. Globe and Sun Position Demo: Identify the season…

Solstices—Summer vs. Winter Solstice = when the tilt of the Earth's axis is oriented directly towards or away from the Sun – Winter solstice is the shortest day of the year. – Summer Solstice is the longest day of the year.

Equinoxes—Spring vs. Fall Equinox literally means "equal night" A day lasts 12 hours and a night lasts 12 hours at all latitudes. This occurs twice a year.

Review: What Season Is It?

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