Chapter 3 Assessment
Terms in this set (16)
An air mass that forms over an ocean is called...
Cool, clear weather is usually brought by a...
b. cold front
Winds spiraling inward toward a center of low pressure form a(n)....
Very large tropical storms with high winds are called...
Most flash floods are caused by
b. heavy rainfall
Summers in the Southwest are hot and dry because of "maritime tropical" air masses.
False - "Continental Tropical"
A "cold front" over an area will bring many days of cloudy weather.
Foggy, rainy, or humid weather usually follows the passage of a "warm front" through an area.
False - "Stationary Front"
Low cumulonimus clouds may bring both thunderstorms and "tornadoes".
On a weather map, "isobars" join places on the map with the same temperature.
False - "Isotherms"
What are the basic characteristics used to describe air masses?
Temperature and humidity.
Describe how wind patterns affect the movement of air masses in North America.
The prevailing westerlies (major wind belts) usually push air masses from west to east.
How does a cold front form?
Cold air mass pushes under a warm air mass forcing warm air to rise. See diagram page 79
Describe three hazards associated with floods?
1. Floods can knock down electrical poles/wires, cutting off power supplies. 2. Floods can cause landslides/mudslides. 3. Floods can block roads preventing rescue/emergency vehicles from getting through.
What are some of the sources of information that meteorologists use to predict weather?
Meteorologists use local weather observers (i.e. storm chasers), balloons, satellites, weather stations from around the world, maps, charts,radars and computers to analyze information.
What is El Nino? How does it influence the weather in certain regions?
El Nino is an event that occurs every 2-7 years in the Pacific Ocean. It can cause dramatic climate changes including droughts, heavy rain, floods, and tornadoes.