Weather

In a high pressure systems

• there are few clouds because the air in moving downward
• there are many clouds because the air is very humid
• there are few clouds because the air is moving outward
• there are many clouds because the air is moving upward

A front is

• where warm air is cooling at earth's surface
• a boundary where hot and cold air are separating
• a boundary where two different air masses meet
• where cold air is rising and forming rain clouds

A cold front usually brings what kind of weather?

• snow  
• sunny and fair
• heavy rain and/or thunderstorms 
•  cool and dry 

What is an air mass?

• a place where weather always changes in an extreme way
• a large body of air with the same temperature and moisture
• any cloud that produces rain, sleet, snow or hail
• any kind of air, as long as it is always wet and freezing

What is the purpose of a barometer?

• Tells you that it is going to rain.
• Measures the amount of wind.
• Measusres the amount of clouds in the sky.
• It measure the amount of pressure in the air.

Which weather tool measures wind?

• anemometer
• therometer
• wind vane
• barometer

Ryan is working on his Science Fair project. He plans to measure the amount of rainfall that has fallen in his neighborhood over the past two weeks. What instrument should he use?

• Rain gauge
• Wind Vane
• Barometer
• Thermometer 

The weather forecast tomorrow says there will be a 15 mph wind, a high temperature of 52 degrees and a pressure of 720 mb. What three instruments will a meteorologist use to make this prediction?

• anemometer, barometer, thermometer
• barometer, hygrometer, thermometer
• thermometer, satellite image, hygrometer
• anemometer, satellite image, barometer

Which tool measures humidity or the amount of moisture in the air?

• wind vane
• barometer
• anemometer
• hydrometer

What does this symbol on a weather map indicate? 

• High pressure system
• Low pressure system
• Cold front
• Warm front