CH 10A
The state of the atmosphere at a given time and place is known as_____________________.
Weather
TRUE or FALSE: The weather is always changing because conditions in the atmosphere stay the same.
FALSE
What is the temperature of air measured with?
A Thermometer
The unit of measure for temperature is _______________.
Degrees
TRUE or FALSE: One of the first weather conditions you hear on a weather report is the temperature of the air.
TRUE
The push, or force, of air against an area is called _____________.
Air Pressure
What instrument is used to measure air pressure?
A Barometer
A change in the air pressure indicates a change in _________________.
Weather
The amount of water vapor in the air is known as ________________-.
Humidity
Wind speed is measured with a ________________.
Anemometer
This device which is often shaped like an arrow shows the direction from which the wind is blowing.
Wind Vane
What measures the amount of rainfall?
A Rain Gauge
You can walk out your door and measure the depth of the snow outside using what?
A meterstick or yardstick.
__________________ is a moving boundary line between two air masses.
A Front
What follows a cold front, but only for a short period of time. (Think weather conditions)
Heavy Precipitation
What TWO ways can hail be measured?
1) by its depth on the ground.
2) by the diameter of the hailstones.
This is a huge body of the lower atmosphere that has similar temperature and humidity throughout.
Air Masses
A _____________________ occurs where a warm air mass glides up and over a cooler air mass.
Warm Front
A ____________________ occurs where a cold air mass pushes out and wedges under a warmer air mass.
Cold Front
Explain what happens in a thermometer when it get warm and when it gets cold.
Warm: Heat causes a liquid to expand, or take up more space. When the air gets warmer, the liquid in the thermometer expands and moves up the tube.
Cold: If air gets cooler, the liquid contracts, or takes up less space. Then the liquid moves down the tube.
This device, which is made up of two thermometers measures relative humidity.
Psychrometer
What are the four kinds of precipitation that were mentioned in Chapter 9?
1) Rain
2) Snow
3) Sleet
4) Hail
What are four ways for collecting weather data?
1) Weather Stations
2) Weather Balloons
3) Weather Satellites
4) Radar