2/28 L.T. I can explain how air pressure changes the weather. DO NOW: What are 3 things that effect weather? HW: Pressure section 2 in workbooks (Follow Agenda!)

WIND! Wind: the horizontal movement (compared with earth’s surface) of air in the atmosphere Anemometer: a weather instrument used to measure wind speed Wind Vane: an instrument that spins in the wind and points to the direction the wind is blowing from, which is the wind direction name

[ORIGIN from Greek anemos ‘wind’][ORIGIN from Greek baros ‘weight’]

Follow Ms. Ware and tell me what her wind name would be?

In a high pressure area, air will (rise, sink) because the air is (less, more) dense. This is because the air is (cold, warm) and (rises, sinks). Therefore, clouds CANNOT form.

In a low pressure area, air will (rise, sink) because the air is (less, more) dense. This is because the air is (cold, warm) and (rises, sinks). Therefore, clouds are LIKELY to form.

Correctly draw the direction of wind flow around both a high and a low pressure area in the NORTHERN HEMISPHERE.

low pressure high pressure warm or cold air air rising or sinking clouds or no clouds clockwise or counterclockwise wind direction winds toward or away from the center

On the diagrams below, label which one represents a land breeze and which represents a sea breeze. Correctly label on each diagram where the high and low pressure areas would be found.

On the diagrams below, label which one represents a land breeze and which represents a sea breeze. Correctly label on each diagram where the high and low pressure areas would be found.

On the diagrams below, label which one represents a land breeze and which represents a sea breeze. Correctly label on each diagram where the high and low pressure areas would be found.

How to convert pressure from millibars to inches… USE YOUR CHART!! Millibars (mb) = 1 mb per line Inches (inches of mercury)=.01 inches

DO NOW: make sure this is in your notebooks!!!!! If you want to abbreviate millibars Step 1: Drop the 9 or 10 in the front Step 2: Get rid of the decimal Ex => 136 or => 984 If you want to change the abbreviation to the actual measurement Step 1: If the number is lower than 500, add a 10 and replace the decimal Step 2: If the number is higher than 500, add 9 and add the decimal Ex. 348 => => 997.8

Practice!!! Abbreviate These… AnswerFind the original amt. Answer

Agenda: 1.) Do Now: 5 minutes 2.) Review pressure/ fronts: 15 mins 3) Lab: 60 mins

What’s the relationship between wind and waves?

Using the chart on page 14, state the prevailing wind direction for each latitude below: 45°N 45°S 75°N 20°N