Severe Weather
Thunder and lightning happen during this type of storm
Thunderstorms
The most important properties of air masses are temperature and ______________________.
Water vapor
This often happens at fronts due to the condensation of water vapor
Precipitation
A weather instrument used to find how much heat something has
Thermometer
The area of the United States which is known for tornadoes is nicknamed this.
Hurricanes rotate in this direction in the northern hemisphere
Counterclockwise
Air masses are categorized by their ______________ and their _____________________.
Temperature and their location (i.e. continental, maritime)
One morning, you need a light coat to play outside. A thunderstorm forces you to go inside for several hours. That afternoon, you need a heavy coat to go outside. This kind of front has passed:
A cold front
Scientists use these remains or traces to study past climates
Fossils
Air pressure is affected by these three things:
Temperature, Altitude, and Moisture level
There is little or no precipitation here, and sometimes the sky is cloudless making some people believe this storm is over
The eye of a hurricane
This type of air mass generally has warm and moist air
Maritime tropical air mass
Fronts accompany low pressure. This instrument would help you measure air pressure:
Barometer
Climate is defined as this:
Average weather conditions in an area over a long period of time
If you are standing on the middle of a mountain and you want to breathe less dense air, you walk ________ the mountain.
Walk up the mountain.
A rotating column of wind which may only last for a few minutes
A tornado
Heavy but brief precipitation often falls when a cold front displaces this:
In the U.S., fronts usually move in this direction.
From west to east
This instrument measures wind speed
Anemometer
The triangles of a cold front point in this direction:
The direction the cold front is going.
A tornado is called this before it touches the ground
A funnel cloud
This moves air masses from place to place in the United States.
The Jet Stream
At warm fronts, warm air gradually moves over cooler air, creating this kind of weather
Light precipitation over a longer period of time
Some scientists believe the atmosphere was blocked with dust from volcanic eruptions leading to a cold time period in the 1600s known as this:
the Little Ice Age
The rising and sinking of air in a circular path
Convection currents