1.
mass Large bodies of air that have uniform temperature, humidity, and pressure.
2.
pressure The weight of the air pushing down on earth.
3.
Measures the speed of wind.
4.
Measures the air pressure.
5.
front Form when a colder air mass moves toward a warmer air.
6.
effect Earth's rotation causes moving air and water to appear to curve to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.
7.
radar Effectively image the precipitation in a thunderstorm from the reflection of the water droplets in the system.
8.
stream A warm water current that comes from the equator.
9.
Change in moisture content.
10.
Intense tropical storm with winds exceeding 119 km/hr. formed over warm ocean water as a low-pressure area.
11.
Measures the percentage of water vapor in the air known as humidity.
12.
stream Near the top of the troposphere are narrow bands of high winds.
13.
front When fast-moving cold front catches up with a slow-moving warm front.
14.
westerlies Steady winds that flow from west to east between latitudes 30N, 60N, 30S, and 60S.
15.
easterlies Cold winds that blow from east to west near the North pole and the South Pole.
16.
systems A high pressure system generally means good weather because it attracts cool and dry air. A low pressure system generally means rainy or cloudy weather. This is because low pressure systems generally attract warm and moist air.
17.
gauge Measures the amount of precipitation that has fallen.
18.
psychrometer Measures the percentage of water vapor in the air known as humidity.
19.
front When a boundary between two air masses stalls.
20.
Measures the amount of heat in the atmosphere known as temperature.
21.
Small storm accompanied by thunder and lightning formed from large cumulonimbus clouds.
22.
Rapidly, whirling, funnel-shaped cloud that reaches down from a storm cloud and touches the earth’s surface formed when thunderstorm updrafts begin to rotate.
23.
winds Steady winds that flow from east to west between 30N latitude and 30S latitude.
24.
front When less dense, warmer air moves toward colder, denser air.
25.
vane Measures the direction of the blowing wind.
