1. low angle (Winkel) high angle (Winkel)
Why is it colder at the polar zone and warmer at the tropical zone?
Bundle of sunrays A
low angle (Winkel)
Bundle of sunrays B
high angle (Winkel)
Bundle of sunrays A
Bundle of sunrays B
hits the Earth at a low angle (Winkel)
hits the Earth at a high angle (Winkel)

2. Why is it colder at the polar zone and warmer at the tropical zone?
Bundle of sunrays A
large area
Bundle of sunrays B
small area
Bundle of sunrays A
Bundle of sunrays B
sunrays are spread over a large area
sunrays are spread over a small area

3. Why is it colder at the polar zone and warmer at the tropical zone?
Bundle of sunrays A
long distance from the sun
Bundle of sunrays B
short distance from the sun
Bundle of sunrays A
Bundle of sunrays B
travels a long distance from the sun
to the Earth
travels a short distance from the sun to the Earth

4. Why is it colder at the polar zone and warmer at the tropical zone?
Bundle of sunrays A
Zone A does not get much heat
Bundle of sunrays B
Zone B gets much heat
Bundle of sunrays A
Bundle of sunrays B
Zone A does not get not much heat
 polar zone
Zone B gets much heat
 tropical zone