Earth’s Day/Night, Year, & Seasons How rotation, revolution, and tilt cause it all!

Earth’s Day/Night, Earth’s Day/Night, Year, & SeasonsYear, & Seasons

How rotation, revolution, and tilt cause it How rotation, revolution, and tilt cause it all!all!

© William Wilkinson, InteractiveScienceTeacher.com

© William Wilkinson, InteractiveScienceTeacher.com

(every 9 cm)(every 9 cm)

The Cause of Earth’s…

Cut lines (top sheet only!)Cut lines (top sheet only!)

Day/Night Year Seasons

© William Wilkinson, InteractiveScienceTeacher.com

The Cause of Earth’s…Day/Night Year Seasons

© William Wilkinson, InteractiveScienceTeacher.com

The Cause of Earth’s…Day/Night Year Seasons

© William Wilkinson, InteractiveScienceTeacher.com

The Cause of Earth’s…Day/Night

Rotation is the spinning of a body, in this case Earth, on its axis.

Earth spins/rotates counterclockwise.

It takes 24 hours for one rotation.

The side facing the Sun experiences day, and the side facing away from the Sun experiences night.

(Definition)(Definition)

(Key Statements)(Key Statements)

Year Seasons

© William Wilkinson, InteractiveScienceTeacher.com

The Cause of Earth’s…Day/Night Year Seasons

© William Wilkinson, InteractiveScienceTeacher.com

The Cause of Earth’s…Day/Night

(Definition)(Definition)

(Key Statements)(Key Statements)

Year Seasons• when one body revolves around• another in space• the Earth rotates while it revolves;

• it’s moving about 30,000 meters• per second;

• the path is not a perfect circle

© William Wilkinson, InteractiveScienceTeacher.com

The Cause of Earth’s…Day/Night

NO! YES!

Year Seasons

© William Wilkinson, InteractiveScienceTeacher.com

The Cause of Earth’s…Day/Night Year Seasons

• how much the axis “leans” off center; the Earth’s axis is 23.5°

• a season is a pattern of temperature and weather

• seasons are caused by how much sunlight is received, and that is caused by the tilt and by Earth’s position around the sun; on an equinox the sun shines equally on the northern and southern hemispheres