1

Aim: How does the earth's revolution affect insolation?

A B C

Do Now:

Which location receives the most intense insolation?

As the altitude of the sun increases the intensity of insolation ___________.

Why?

2

Aim: How does the earth's revolution affect insolation?

Is this the way the earth looks when viewed from space?Why or why not?

3

Aim: How does the earth's revolution affect insolation?

The earth's tilt is constant. What does this mean for insolation?

This is the reason why we have seasons!

Because the tilt never changes, it causes the angles of insolation to change as we revolve around the sun

4

The Equinoxes Dates when the tilt of Earth is parallel to the

solar radiationSeptember 21March 21

The SolsticesDates when the tilt of

Earth is perpendicular to the solar radiation

June 21December 21

Aim: How does the earth's revolution affect insolation?The 4 most important dates:

5

Aim: How does the earth's revolution affect insolation? What is the date?

6

Aim: How does the earth's revolution affect insolation? What is the date?

7

Aim: How does the earth's revolution affect insolation? What is the date?

8

Aim: How does the earth's revolution affect insolation?

The tilt also causes some crazy things to happen at the poles!

9

Aim: How does the earth's revolution affect insolation?

10

Aim: How does the earth's revolution affect insolation?

11

At which location are the Sun's noontime rays perpendicular to the Earth's surface at the Tropic of Cancer (23.5o N)?

(1) A (2) B (3) C (4) D

Aim: How does the earth's revolution affect insolation?

12

Aim: How does the earth's revolution affect insolation?

Since the seasons are caused by the tilt of our Earth, what would happen to our seasons if the Earth was tilted......

1. 0o of tilt2. 15o of tilt3. 45o of tilt4. 90o of tilt

Your group will be assigned one of the following;

Be prepared to share your answers with the class