1. SEASONS
V. Cruz

2. The Earth’s axis is tilted 23.50 from vertical.
The axis always points in the same direction in space.

3. Seasons change depending on the amount of sunlight reaching the Earth as it revolves around the Sun.

4. Indirect Sunlight
Light is spread over a larger area (scattered) and it is less intense.
Light covers a smaller area and it is more intense.
Direct Sunlight

5. During our summer the northern hemisphere is tilted toward the Sun.
Summer solstice June 21-22
Direct Sunlight
Direct Sunlight
Direct Sunlight
The hemisphere that is tilted toward the Sun receives more direct sunlight. The Sun rays are less scattered.

6. The Sun is visible for 24 hours in the Arctic Circle in June.
The hemisphere that is tilted toward the Sun has longer days and shorter nights.
The Sun is visible for 24 hours in the Arctic Circle in June.
Summer solstice June 21-22

7. Winter Solstice December 21-22
During our winter the northern hemisphere is tilted away from the Sun.
Indirect sunlight
Indirect sunlight
Winter Solstice December 21-22
We are receiving sunlight at an indirect angle. The sun rays are scattered.

8. We receive less sunlight and less energy during winter.
Indirect Sunlight
Indirect sunlight
Less thermal energy (heat) means lower temperatures in the winter.

9. During fall and spring the Earth’s axis is parallel to the sun.
Sunlight
Sunlight
Sunlight
Sunlight
Vernal Equinox (Spring) –March 20 Autumnal Equinox (Fall) – September 22
The northern and southern hemispheres get equal amount of sunlight.

10. December 20 Winter Solstice
March 20
Vernal Equinox
December 20 Winter Solstice
Direct Sunlight
Indirect Sunlight
June 20 Summer Solstice
September 22
Autumnal Equinox

13. THE END!!