1. Air Masses & Fronts Objective Drill
You will use air masses, fronts and pressure in order to explain how weather changes and conditions occur.
What is the method of heat transfer that is used throughout the atmosphere to cause clouds and essentially weather?

2. What is Air Pressure Air weight that varies over Earth’s surface
Warmer air is less dense and exerts less pressure
Cooler air is more dense and exerts more pressure

3. What is Air Pressure? High Pressure Low Pressure
When cooler air sinks and is warmed, the air can hold more moisture
This usually means sunny skies
Winds tend to move clockwise around a high

4. What is Air Pressure? Low Pressure Low Pressure
When warm air rises and is cooled, the air can not hold as much moisture
Often, these areas are associated with precipitation and stormy weather
Winds tend to move counter clockwise around the low

5. What does this mean for us?
These highs and lows move or less along the jet stream and bring us our weather changes

6. What is an Air Mass?
An air mass is a large body of air whose temperature and moisture are fairly similar at a given altitude; properties like the part of Earth’s surface over which it formed.

7. Website

8. Click on Task 6

9. Use these websites to Identify types of Air Masses!

10. Closure:
Explain how air masses, air pressure, and fronts are responsible for our weather. ( use all 3 terms in your response and terms you used throughout the activity) (5 sentences).