CH. 3 SECTION 1

1
CH. 3 SECTION 1 EARTH-SUN RELATIONSHIPS
2
WEATHER v. CLIMATE
Weather-
the condition of the atmosphere in one place
during a short period of time
Climate-
weather patterns that an area typically
experiences during a long period of time
3
THE GREENHOUSE EFFECT

• WHAT IS IT?
• IS IT GOOD OR BAD?

4
EARTHS TILT AND ROTATION

• AXIS
• -tilted at 23 1/2 degrees
• -affects temperature
• ROTATION
• -takes 24 hours
• -causes day and night

5
EARTHS REVOLUTION

• It takes 365 1/4 days for the earth to revolve
  around the sun.
• Revolution and tilt cause the seasons

6
EARTHS REVOLUTION (cont.)

• Equinox- the sun is directly over the equator--
  day and night are equal
• - occurs on March 21 (Spring) and Sept. 23
  (Autumn)

7
EARTHS REVOLUTION (cont.)

• Solstice- when the sun reaches 23 1/2 degrees
  latitude
• Tropic of Cancer- North (June 21)
• Tropic of Capricorn- South (Dec. 22)
• shortest/ longest days of the year

8
MIDNIGHT SUN
6 MONTHS OF CONTINUOUS LIGHT/ DARKNESS AT THE
POLES
9
NORTHERN LIGHTS