Water in the Atmosphere
An instrument used to measure relative humidity.
What is a psychrometer?
Very high feathery clouds
What are cirrus clouds?
This weather front can cause abrupt weather changes, including thunderstorms.
What is a cold front.
A funnel-shaped cloud that touches Earth's surface
What is a tornado?
These three types of technologies have improved significantly over the past 40 years, improving weather data and forecasting.
What are weather satellites, weather balloons, computer models and automated weather stations?
The percentage of water vapor in the air compared to maximum amount that it can hold.
What is relative humidity?
Large clouds that often produce thunderstorms
What are cumulonimbus clouds?
The front formed when a warm air mass overtakes a cold air mass
What is a warm front?
Storms form from a sudden change in this, which is usually measured with a barometer
What is air pressure?
Rain or snow is associated with this type of air mass.
What is low pressure?
The process by which liquid water molecules escape into the air and turn into water vapor.
What is evaporation?
The temperature at which condensation begins
What is the dew point?
The front formed when a warm air mass is caught between two cooler air masses
What is an occluded front?
Tornadoes often form in this type of cloud
What is a cumulonimbus?
Long period of scarce rainfall can cause this weather pattern
What is a drought?
The water cycle is powered by this.
What is the sun?
The type of weather you would expect to see with cumulus clouds
What is fair weather?
The type of front that can cause days of clouds and precipitation
What is a stationary front?
Long lasting storms with winds of 119 km/h and form over a warm water source
What is a hurricane?
Isobars and isotherms are contour lines on weather maps that mark these measurements.
What is areas of the same air pressure (isobars) and temperature (isotherms)?
Relative Humidity: (Hint: use chart on page 121) dry bulb temperature - 14 degrees Celsius wet bulb temperature - 19 degrees Celsius Find the percentage of relative humidity.
What is 50%?
Name the two things necessary for cloud formation
What is cooling of the air and the presence of particles?
These two weather systems are know as cyclones and anticyclones.
What are low pressure systems where air spirals inward in a counterclockwise motion (cyclones.) And, high pressure systems where air spirals outward in a clockwise motion (anitcyclones.)
A "dome" of water that sweeps across the land causing great damage. It is usually associated with hurricanes.
What is a storm surge?
A tiny disturbance in the atmosphere that may cause a larger disturbance later has been given this scientific-sounding name.
What is the "butterfly effect"?