M1 Science Revision 1

Variables such as humidity and wind speed are used to describe what ?

•  precipitation

• weather

• air pressure

What is humidity?

• The temperature of the air

• Rain formation

• The amount of water vapor in the air

What phase change causes liquid water to turn into water vapor in the atmosphere?

• Evaporation

• Transpiration

• Sublimation

Which is the main weather variable responsible for storms?

• Changes in air pressure

• Clouds

• Wind direction

What direction does the wind blow? 

• From left to right

• From high temperature to low temperature

• From high pressure to low pressure

What instrument is used to measure air pressure? 

• Thermometer  

       

• Barometer

• Anemometer

What is the relative humidity at dew point?

• 25%

• 50%

• 100%

How is radar able to measure precipitation?

• Radar measures the wind speed, which slows down when carrying rain.

• Radio waves will bounce off the raindrops and reflect back.

• A radiosonde in the atmosphere sends back the data via radar link.

What is a surface report?

• detailed map of the surface provided by satellites

• a brief report of collected data

• a set of weather measurements taken on the surface of Earth

How are infrared weather maps created?

• Satellites

• Human observations

• Barometers