5 Written Questions
5 Matching Questions
- What is the rule for naming winds?
- What is the ITCZ?
- What do low pressure cells tend to do?
- What is an isopleth?
- a An isopleth is a line on a weather chart that represents an equal value of some quantity.
- b The wind direction is always reported as the direction from which the wind is blowing. Winds which blow from the west, for example, are westerlies. They blow towards the east. Winds which blow from the south are called southerlies. They blow towards the north.
- c Equal wind speed.
- d Low pressure cells tend to ascend and converge.
- e The ITCZ stands for the Intertropical Convergence Zone, which is the area along the equator where a discontinuous series of thunderstorms occurs, due to the uplift caused by the convergence of winds and solar heating of the ground along the equator.
5 Multiple Choice Questions
- Equal elevation.
- An isoline connecting all points of highest mean temperature.
The Coriolis Effect deflects winds fro ma straight line in relation to the Earth's rotating surface. Earth's rotation adds the Coriolis Effects and a "twist" to air movements. In the Northern Hemisphere, winds are deflected to the right, or the east. In the Southern Hemisphere, winds are deflected to the left, or the west.
- The Polar High Pressure consists of polar easterlies and the Antarctic High pressure area.
- Air pressure tendency is important, along with the air pressure reading on a barometer. Falling air pressure, which corresponds to a decrease in the length of mercury in the column on a mercurial barometer, generally indicates stormy weather.
5 True/False Questions
Describe land-sea breezes. →
Land-sea breezes are driven by the thermal inertia of water. When land and sea receive the same amount of insolation, the land heats up faster than the water. This temperature gradient causes winds to blow. At night, radiational cooling cools the land faster than the water so that the temperature gradient makes a wind blow from land to sea. These breezes also occur for large bodies of water, such as the Great Lakes.
Describe friction forces. →
Friction forces drag winds as they move across various surfaces. This effect decreases with height above a surface, and causes air spiraling out of a high pressure cell to turn clockwise (anticyclone). Air spiraling out of a low pressure cell turns counter-clockwise (cyclone). NOTE that in the Southern Hemisphere, this effect is in reverse: high pressures produce cyclones, and low pressures produce anticyclones.
What does tertiary circulation in the atmosphere entail? → Tertiary circulation is the movement of local high and low pressure cells, and parcels of air will cause local weather patterns, such as the weather patterns of a coastal city that is influenced by the body of water nearby.
How is air pressure measured? → A barometer can measure changes in air pressure. The two types of barometers are the mercurial barometer, which is more accurate but less easily transportable, and the aneroid barometer, which is less accurate but more portable.
Isohyet? → Equal rainfall.