1. Standard and Essential Question
S6E2c. Relate the tilt of the earth to the distribution of sunlight throughout the year and its effect on climate.
How does the tilt of the earth affect the seasons and Earth’s climate?

2. Standard and Essential Question

3. Tilt of the Axis- always points in the same direction

4. Standard and Essential Question
S6E2c. Relate the tilt of the earth to the distribution of sunlight throughout the year and its effect on climate.
How does the tilt of the earth affect the seasons and Earth’s climate?

5. The Seasons What is the difference between rotation and revolution ?
What causes the earth’s seasons ?
What is the position of earth during each season?
How does Earth’s tilt cause temperature differences in the seasons ?

6. Rotation vs. Revolution

7. The Earth’s Axis
The axis always points to the star Polaris.

8. Rotation vs. Revolution

9. Rotation Rotation: The Earth makes one complete rotation in 24 hours.
Causes us to have day and night.

10. Rotation
Animation:

11. Revolution
Revolution:
An object traveling on a path around another object.
The Earth traveling around the sun.
The Earth REVOLVES around the sun
One revolution takes approximately 365 days ( 1 year)
The Earth’s revolution around the sun is why we have years and seasons.
In the box on your notes, draw the Earth revolving around the sun.

12. What causes the Earth’s Seasons ?

13. What causes the Earth’s Seasons ?
The earth is divided by the equator into two halves called hemispheres ( North and South)

14. What causes the Earth’s Seasons ?
Earth’s orbit + the way that the Earth tilts on its axis causes the seasons.
The sun’s rays strike Earth unevenly- at different angles at different times of the year

15. Position of Earth
The seasons are always opposite in Earth’s Northern and Southern Hemispheres.

16. Position of Earth Summer: the hemisphere pointing towards the sun.
Winter: in the hemisphere pointing away from the sun.
Fall/Spring: when both hemispheres are facing the sun equally.

17. Position of Earth Northern Hemisphere tilts towards the sun=
summer in N. Hemisphere
winter in S. Hemisphere
Southern Hemisphere tilts towards the sun=
summer in Southern Hemisphere
winter in Northern Hemisphere

18. Position of Earth
Two points where axis is not tilted away or toward the sun. These points mark the beginning of fall and spring
Fall in Northern Hemisphere, Spring in Southern Hemisphere
Spring in Northern Hemisphere, Fall in Southern Hemisphere

19. Position of Earth
When it is fall in the Northern Hemisphere, what season is in the Southern Hemisphere?
When it is winter in the Northern Hemisphere, what season is in the Southern Hemisphere?
When it is spring in the Northern hemisphere, what season is it in the Southern hemisphere?
When it is fall in the Southern Hemisphere, what season is it in the Northern Hemisphere?

20. Opposite Seasons

21. Fill in the blank for what season it would be in the southern hemisphere.
Northern Hemisphere
Spring
Summer
Fall
Winter
Southern Hemisphere
The seasons are always opposite in Earth’s Northern and Southern Hemispheres.

22. What causes the Earth’s Seasons ?
physics.weber.edu

23. What causes the Earth’s Seasons ?
web.gccaz.edu

24. Flashlight Activity
The sun’s rays deliver the most energy when Direct

25. What causes the Earth’s Seasons ?
en.allexperts.com

26. What causes the Earth’s Seasons ?

27. Position of Earth September 22 or 23 December 21 or 22 June 21 or 22
March 20 or 21

28. Position of Earth `

29. What causes the Earth’s Seasons ?
Cnx.org

30. Temperature and Daylight
The sun’s rays deliver the most energy when Direct

31. Temperature and Daylight
During Winter, sunlight is Less direct, meaning the area receives less Energy from the sun
During Summer, sunlight is More direct, meaning the area receives more Energy from the sun

32. Flashlight Activity The sun’s rays deliver the most energy when Direct
The sun’s rays deliver the most energy when Direct

33. Temperature and Daylight
The amount of daylight also changes with the seasons.

34. Temperature and Daylight
The amount of daylight also changes with the seasons.
In the Northern Hemisphere, from Dec. 21st to June 21st the period of daylight gets longer, from June 21 to Dec. 21st, the period of daylight gets shorter

35. Temperature and Daylight
frontierbushcraft.com

36. Temperature and Daylight
The amount of daylight also changes with the seasons.
Summer
More hours of daylight
Sun Heats surface longer
Temperatures higher
Winter
Less hours of daylight
Sun heats surface for a shorter amount of time
Temperatures
lower

37. Temperature and Daylight
The amount of daylight also changes with the seasons.

38. Exceptions to the Seasons
Many parts of the earth do not have distinct seasons
Places near the equator: receive direct sunlight all year long, so temperatures remain high
The north and south poles: get less direct sunlight from farther poles, so even in summer, these places are still cold.

39. Exceptions to the Seasons
Climate: average, year-after-year conditions of temperature, precipitation of an area.
Influenced by latituide, ocean currents, near land/water.

40. Exceptions to the Seasons
3 temperature zones:
Tropical zone: around equator, extending to 23.5*N and 23.5*S.
Warm climate because direct sunlight all year round.
Polar zones: near poles from 66.5*-90*S and 66.5*-90* N
cold climate b/c receives sunlight at an angle.
Temperate Zones: weather that ranges from warm in summer to cold in winter. Between 23.5 & 66.5.

41. Exceptions to the Seasons
Marine climates: warm winters and cool summers because large bodies of water cool down slowly and heat up slowly.
* also because of ocean currents.
Continental climates: cold winters and hot summers b/c no water.

42. Exceptions to the Seasons
Seasons change as the amount of energy that each hemisphere receives from the sun changes.