Module 9 Test

Narrow bands of fast, high-altitude westerly winds are

• jet streams.

• polar easterlies.

• warm fronts.

• 
  air masses.

A weather instrument that measures temperature is a(n)

• 
  thermometer.

• barometer.

• hygrometer.

• anemometer.

A balloon-borne package of sensors that gathers upper-level temperature, air pressure, and humidity is

• a hygrometer.

• Doppler radar.

• a satellite.

• 
  a radiosonde.

The change in wave frequency of energy as it moves toward or away from an observer is the

• Doppler effect.

• convergence effect.

• Coriolis effect.

• radar effect.

Polar and tropical regions maintain fairly constant average temperatures because

• Earth radiates extra energy back into space.

• the Sun always strikes these regions at the same angle.

• the continual motion of air and water reallocates heat energy throughout Earth.

• air masses remain stationary near the poles and equator.

Differences in thermal energy can be detected with

• visible light.

• infrared imagery

• sonar imagery.

• ultraviolet imagery.

A record of weather data for a particular site at a particular time is a(n)

• climate map.

• station model.

• topographic map.

• isopleth model.

Lines on a map that connect points of equal pressure are

• fronts.

• boundaries.

• isobars.

• station models.

The exchange of heat or moisture with the surface over which an air mass travels is known as

• intertropical convergence.

• occlusion.

• air mass modification.

• air mass exchange.

Explain how air masses form, and how they help redistribute energy on Earth's surface.