10/7/13 30th Day of School Learning Goal (7.E.1.3): I will be able to explain how the difference in high- and low-pressure systems affect our weather. Due Today: Any missing assignments. Evening Assignment: Finish flashcards and questions.

Do Now Use Intellicast.com to answer the following:Intellicast.com 1)What type of front is moving into NC? 2)How will this front affect our weather? 3)What is our air pressure over NC (see little number on map)

In your notebook, write what you observe about the differences between H (high pressure) and L (low pressure) based on the two images below: High- and Low-Pressure Systems McDougall, p.A84

High- and Low-Pressure Systems High pressure system Air moves down, out, and clockwise Low pressure system Air moves in, up, and counterclockwise

Isobars are lines that connect areas with the same air pressure. They are used to identify areas of high and low pressure. They also help forecast wind speed and direction. Below air pressure is measured in millibars (mBars). Isobars McDougall, p.A101

High- and Low-Pressure Systems Systems air flow in the Southern Hemisphere

On the front of three cards write the following terms in big, bold letters: High-Pressure System Low-Pressure System Isobars (just define & describe how they can affect wind) On the back side of the index card write in your own words the following information about each one: 1.Description: 2.How it forms: 3.Direction of air flow: 4.Weather: High- and Low-Pressure Systems McDougall, p.A84

Knowledge Check In your science notebook write the questions and answer #4, 5, & 6 page A85.

Evening Assignment 1)Finish flashcards for: High-Pressure System Low-Pressure System Isobar 2)Complete questions #4, 5 & 6 page A85.