ESS2.7 Day 1

​6.ESS2.7
Collect data to provide evidence for

how the interactions of air masses result in changes in local weather conditions and how that data can be used to predict probable local weather patterns.

​​Essential Question:
How do interactions between air masses cause changes in local weather, and how can we use data to predict these weather patterns?

​Engage​:
Do your best. This is just a preview. I'll give the same quiz after the lesson to see what you've learned.

Multiple Choice

What kind of weather is Seattle likely having? How long will it stay that way?

• Seattle is having dry, sunny weather that will leave soon.

• Seattle is having wet, rainy weather that will stay in the area for several days.

Multiple Choice

What kind of weather is Denver experiencing?

• Denver has just experienced a cold front and there are many snow storms. The air will dry out in a couple of days and get colder.

• Denver has just experienced a warm front and there will be sunshine. The air will be moist for the next few days and get warmer.

Multiple Choice

What do you expect the weather to be like in NYC?

• NYC will have light rainfall until the front moves through.

• NYC will have sunshine as the front moves through.

Multiple Choice

What is the expected weather in Houston in about 48 hours?

• Houston will likely see sunshine and warmer temperatures in the coming days.

• Houston will likely see heavy thunderstorms or even snow/ice in the coming days. It will get colder.

​Explore:

Explain​

Meteorologists use lines called isobars to connect points of equal atmospheric pressure. 

For example, a weather map may feature a line connecting all points where the pressure is 996 mb and a line below that where the pressure is 1,000 mb. 

Points above an isobar are lower pressure and points below are higher pressure. 

Isobars and weather maps help meteorologists plot the coming changes in weather over a region.

​High and Low Pressure- Read and annotate this part of page 37 in your booklet with your 1 2 partner.​

​FYI: Normal Pressure Info:

A barometric reading in the range of 29.80 and 30.20 inHg can be considered normal, and normal pressure is associated with steady weather.

​If the reading falls between 29.80 and 30.20 inHg (1022.689–1009.144 mb):

-Rising or steady pressure means present conditions will continue.

-Slowly falling pressure means little change in the weather.

-Rapidly falling pressure means that rain is likely, or snow if it is cold enough.

​Turn to pg. 38 in your Weather Booklet.
We will use these visuals to help us understand high and low pressure.

​Make a connection between the graphic from your journal and the description to the left.​

​• A mass of cool, dry air.

• Generally brings fair weather and light winds

• Bring sunny skies

• Represented as a big, blue H on a weather map

​High Pressure Review page 38​

​Make a connection between the graphic we put in our journal and the facts to the left.​

​• Mass of warm moist air

• Generally brings strong winds and stormy weather

• Represented by a big, red L on a weather map

​Low pressure review page 38

​Use your red and blue colored pencils to color as shown below. Then make some notes on the chart at the bottom of the page. 

​What causes high and low pressure?​

​Air pressure on a larger scale...

​Elaborate:


Read the text on page 39 and answer the questions at the bottom of the page.​