2. February 25, 2014
WRITE THESE 2 QUESTIONS IN YOUR JOURNAL AND ANSWER THEM:
What 3 major variables affect weather?
2. Provide an example of how conduction, convection, and radiation move heat in the atmosphere.

3. What 3 major variables affect weather?
. Temperature
Well where on Earth is the temperature (heat) greatest? Where is the least heat? Why?
Humidity – amount of moisture in the air. Hygrometer measures this.
Air Pressure – force exerted by tiny air particles. Measured with Barometer

4. How is Heat from the Sun transferred through the Atmosphere
The sun's energy moves through space, then through the earth's atmosphere and finally reaches the earth's surface. The sun's radiation warms the earth's atmosphere and surface and becomes heat (thermal) energy. This heat energy is transferred through the atmosphere by one of three mechanisms:
Radiation
Conduction
Convection

5. Conduction, Convection & Radiation Cause Weather
Radiation – waves (Electromagnetic) Convection – oceans Conduction – air masses touch causing air to move

6. Ocean Currents

7. Hemisphere
Half of the terrestrial globe or celestial sphere!

8. Equator An imaginary line that wraps around Earth
at 0°latitude separating the surface
into two equal parts!

9. Axis The imaginary line extending from the North
Pole to the South Pole going through the
center of Earth, which is the center of Earth’s rotation.

10. Tilt degrees
The slant of Earth’s axis, which is 23.5° from vertical

11. Rotation – 24 hours The spinning of Earth on its axis
that causes day and night to occur

12. Revolution – 1 year
Earth’s year-long elliptical orbit
around the Sun.

13. Seasons – Spring, Summer, Winter, Fall (Autumn)

14. Seasons – cont.
Weather changes due to varied amounts of sunlight (both intensity and number of daylight hours received); Caused by the tilt of Earth during revolution!