1. Earth’s Tilt The Earth’s axis is tilted 23 ½ degrees. Tilted Axis
23 ½ Degree Tilt
Tilted Axis
The Earth’s axis is tilted 23 ½ degrees.

2. Earth’s Seasons
Equator
Axis
Earth
Northern Hemisphere
Southern Hemisphere
Sun
Caused when the different hemispheres of Earth are tilted toward or away from the Sun.

3. Earth’s Seasons
More direct rays of light
Less direct rays of light
Sun
Northern Hemisphere
Southern Hemisphere
The hemisphere tilted toward the Sun gets more direct light rays from the Sun which makes it hotter in that area.

4. Earth’s Seasons Less direct rays = winter More direct rays = summer
Sun
Summer in this hemisphere.
Winter in this hemisphere.
Northern Hemisphere
Southern Hemisphere
Less direct rays = winter
More direct rays = summer

5. Earth’s Seasons
Northern Hemisphere
Southern Hemisphere
Sun
When both hemispheres get an equal amount of light, we have fall or spring.

6. Earth’s Seasons
Spring – Northern Hemisphere
Summer Northern Hemisphere
Winter Northern Hemisphere
Fall – Northern Hemisphere
The reason one hemisphere is tilted more towards the sun is due to the Earth’s revolution around the Sun.

7. Fall and Spring
Northern and Southern Hemispheres are getting an equal amount of Sun’s direct rays.
*Sketch and label fall and spring.
Sun
Fall
Spring

8. Winter Northern Hemisphere is getting less of the Sun’s direct rays.
*Sketch and label winter and summer.
Northern Hemisphere is getting less of the Sun’s direct rays.
Sun
Summer
Winter

9. Summer Northern Hemisphere is getting more of the Sun’s direct rays.
*Sketch and label winter and summer.
Sun
Summer
Winter

10. Be ready for a quiz in class Wednesday!