1. WEATHER
VS.
CLIMATE

2. WEATHER
Average condition of the atmosphere over a short period of time in a particular place.

3. CLIMATE
The typical weather condition in a particular place during a long period of time.

4. FACTORS AFFECTING WEATHER

5. AIR TEMPERATURE
Due to the heat air absorbs from or gives off to the environment.
SPECIFIC HEAT – amount of energy needed to raise the temperature of a substance.
Thermometer

6. AIR PRESSURE
The force exerted per unit area due to the gravitational pull of the Earth.
Barometer

7. HUMIDITY Amount of water vapor present in the air.
RELATIVE HUMIDITY – ratio of the air’s water vapor present in the air.

8. PRECIPITATION
Sin
The transfer of water from the atmosphere to the Earth’s surface.
Rain Gauge
Drizzle, Rain, Snow, Hail, Sleet

9. FORM OF PRECIPITATION
DESCRIPTION
Rain
Rain is formed when snow melts as it falls and when water droplets became heavy.
Snow
Water vapor changes directly into solid crystals.
Sleet
Snow melts but falls through layers of cold air where it refreezes.
Hail
Sleet is pushed up and down in the atmosphere until it grows larger and then falls.

10. WIND
Sin
Generated by the differences in temperature that occur on Earth’s surface.
Wind Vane
Anemometer

11. AIR MASS
A large section of the Earth’s atmosphere near the Earth’s surface that has the same temperature and contains the same amount of moisture as the surface.

12. MARITIME AIR MASS CONTINENTAL AIR MASS
Air masses that originate from the sea and therefore moist.
CONTINENTAL AIR MASS
Air masses that originate from land and therefore dry.