Air pressure is the weight of the atmosphere pressing down at a certain location. It can change as air particles move farther apart or closer together. Weather scientists use a barometer to measure air pressure. There are two types of air pressure - high and low - and changes in air pressure indicate that weather is changing, with low pressure typically bringing rainy or stormy conditions while high pressure usually means fair weather and sun.

1. Weather
Air Pressure

2. What is air pressure and how is it
measured?
~ Turn and Talk about what you think air
pressure is and how is it measured.
~ SHARE what you came up with as a class

3. What is air pressure and how is it
measured? - NOTES
Air pressure is the weight of the
atmosphere pressing at a certain place.
Air pressure can change because air
particles can move farther apart or closer
together.

4. Measuring Air Pressure- NOTES
Weather scientists use a barometer to
measure air pressure.

5. Air Pressure and Weather - NOTES
Air Pressure and Wind go hand in hand.
There are two types of air pressure: High (H)
and Low (L)
Changes in air pressure means the weather is
changing.

6. Air Pressure and Weather - NOTES
Low Air Pressure = rainy or stormy weather
High Air Pressure = fair weather, sunny