Ch.18 Geology 1401 – Flashcards

On a weather map, you examine the isobars and find that concentric rings of the pressure system increase in air pressure toward the center. Which type of pressure system is depicted on the map?

Due to the Coriolis and pressure-gradient forces, winds in a low-pressure system in the Northern Hemisphere blow in which direction?

Because of divergence of air associated with an anticyclone, what type of weather is generally associated with this pressure system?

Looking at a weather map of North America, you notice that the isobars in an approaching pressure system are very closely spaced and show a decrease in pressure toward the center. What type of weather would you anticipate over the next 24 to 48 hours?

On a weather map, you notice a large pressure system centered over the Pacific Northwest. This system shows isobars that increase toward the center. In which direction would you expect the winds to be blowing in this system?

What is a cyclone?

Which way does air converge on a cyclone in the Northern Hemisphere?

How does air move near the top of a cyclone?

Why are cyclones generally associated with clouds and rain?

What is an anticylone?

Which way does air move in an anticyclone in the Northern Hemisphere?

Which way does air move in an anticyclone in the Southern Hemisphere?

Why are anticyclones not generally associated with clouds and rain?

At which location would you expect air to have the highest density on a typical winter day? Laredo, Texas Edmonton, Alberta Phoenix, Arizona Barrow, Alaska Denver, Colorado

Which parameter has the most influence in changing air pressure?

In the evening, the weather forecaster on the radio says that the barometer is rising. What should you be prepared for as you get ready to go to school in the morning?

Aneroid Barometer

What substance creates atmospheric pressure?

What force is responsible for generating wind?

You are watching the evening news and the weather segment begins. The meteorologist comments that the pressure tendency is rising. Which of the following set of weather conditions would match this pressure tendency?

Toward which direction would a northwest wind blow?

What conditions would dominate in the southeastern United States in an El Niño year?

Which pressure system is linked to the Sahara Desert?

How are wind measurements described?

The most precise instrument for measuring wind speed is a ________.

What would global wind circulation look like on a nonrotating Earth?

At what latitudes do the trade winds occur?

Description of cyclonic and anticylonic winds in the Northern and Southern Hemispheres?

What wind patterns and weather conditions are associated with low-pressure systems?

What is the Coriolis effect?

What instrument is used to measure air pressure?