Winds from which direction mean that a storm is coming in Utah?
South
100
What is an air mass?
A body of air that has the same temperature and amount of moisture throughout.
100
Define air pressure
the weight of air on Earth's surface
100
Name one kind of weather phenomenon.
Tornado, lightning, thunder, hail, severe winds, severe winter weather, floods
200
What does an anemometer measure?
Wind speed
200
What causes wind?
Differences in air pressure. Air molecules in high pressure want to move to low pressure to equalize.
200
What is a front?
Where two air masses meet.
200
Define meteorologist
A scientist who studies weather
200
Why do thunder and lightning always occur together?
Thunder is sound waves from lightning.
300
Which instrument measures wind speed?
Wind Vane
300
What kind of weather do low-pressure systems bring?
cloudy and rainy weather
300
What always happens at a front?
Some kind of weather.
300
Define severe.
Harsh or unusual
300
Which weather phenomenon is caused by electrical charges in the clouds?
Lightning
400
What does a hygrometer measure?
Humidity
400
What kind of weather do high-pressure systems bring?
sunny weather
400
How is a cold front formed and what kind of weather does it bring?
Cold air mass crashes into a warm air mass. Brings severe weather.
400
Define precipitation.
Water that falls from clouds in the form of rain, snow, hail or sleet.
400
Show the graph on page 28.
Which month had almost equal sunshine and rainfall?
November
500
The weather reporter says that last night it was 45 degrees Fahrenheit, we had 3 inches of rain, and winds at 56 miles per hour. Which weather instruments were used to find this data?
A thermometer, a rain gauge, and an anemometer.
500
Is air a substance? Give one reason to support your answer
Yes.
Possible reasons:
-You can feel something when you fan yourself
-blowing up a balloon
500
How is a warm front formed and what kind of weather does it bring?
Warm air mass moves slowly over a cold air mass. Brings light and steady storms.
500
Define phenomenon.
an unusual event or fact that can be seen or sensed.