Lesson 2.1.1

Lesson 2.1.1

Earth's Rotation & Revolution

Main Idea

Earth’s tilt, rotation, and revolution cause

weather changes and the four seasons.

Rotation & Revolution

• Earth, which is the third planet from the sun, revolved around the sun at a speed of about 67,000 miles per hour

• It takes one year for Earth to make one revolution

• At the same time, Earth rotates on its axis - an imaginary line that runs from the North Pole to the South Pole through the center

• Each rotation takes almost one day

Rotation & Revolution

• Earth tilts at an angle of about 23.5 degrees on its axis

• Because of this tilt, the Northern Hemisphere receives more direct sunlight for half the year, and temperatures are warmer

• During these months, the Southern Hemisphere receives less direct sunlight, and temperatures are cooler

• The second half of the year, is the exact opposite

• This process creates the four seasons

Open Ended

How do Earth’s tilt, rotation, and

revolution cause the seasons?

You must answer in order to submit this assignment.

If you do not answer the question, you will get a zero.