Weather ToolsWeather Tools

• What are tools?

• Can you think of a tool that is used to measure weather?

ThermometerThermometer A tool used to measure temperatureA tool used to measure temperature

How hot or cold it is outsideHow hot or cold it is outside Thermometers have different scalesThermometers have different scales We measure in Fahrenheit!We measure in Fahrenheit!

BarometerBarometer

A tool used to measure air pressureA tool used to measure air pressure The weight of air pushing on the The weight of air pushing on the

earth’s atmosphereearth’s atmosphere

Think: Think:

Barbell= weightliftingBarbell= weightlifting

Bar= weight of airBar= weight of air

HygrometerHygrometer

A tool used to measure humidityA tool used to measure humidity How much water is in the air?How much water is in the air?

Think: h=humidityThink: h=humidity

h= hygrometerh= hygrometer

AnemometerAnemometer

A tool used to measure the wind A tool used to measure the wind speedspeed

How How fastfast is the wind blowing? is the wind blowing?Think: Ants= move fastThink: Ants= move fast

Anemometer= how fast wind is movingAnemometer= how fast wind is moving

Wind VaneWind Vane A tool used to measure the A tool used to measure the

DIRECTION of the windDIRECTION of the wind The arrow points in the direction The arrow points in the direction

from which the wind is blowingfrom which the wind is blowing

Think: wind vane = Think: wind vane =

rooster on roof!rooster on roof!

Rain GaugeRain Gauge

A tool used to measure the amount A tool used to measure the amount of rainfallof rainfall

How much rain have we received in How much rain have we received in Lewisville during the month of Lewisville during the month of February?February?

Hannah wants to measure the Hannah wants to measure the amount of moisture in the air. amount of moisture in the air. She does not want the water She does not want the water in the air to disorder her hair. in the air to disorder her hair. What instrument should she What instrument should she

use?use?

HYGROMETER!HYGROMETER!

Mrs. Fouch and her family Mrs. Fouch and her family plan to go out over the plan to go out over the

weekend on a sailboat. First, weekend on a sailboat. First, she must know how fast the she must know how fast the wind is blowing to see if it’s wind is blowing to see if it’s

appropriate to sail. What appropriate to sail. What instrument should she use?instrument should she use?

ANEMOMETER!ANEMOMETER!

Mrs. Fouch wants to make Mrs. Fouch wants to make sure that she dresses sure that she dresses

correctly when she visits the correctly when she visits the National Zoo. In order for her National Zoo. In order for her

to know the temperature to know the temperature outside, what instrument outside, what instrument

should she use?should she use?

THERMOMETER!THERMOMETER!

Mrs. Fouch just bought a Mrs. Fouch just bought a brand new kite and she is brand new kite and she is

anxious to fly it. Before she anxious to fly it. Before she flies it, she must be cognizant flies it, she must be cognizant of the DIRECTION of the wind. of the DIRECTION of the wind. What instrument should she What instrument should she

use?use?

WIND VANE!WIND VANE!

A meteorologist observes A meteorologist observes some cumulonimbus clouds some cumulonimbus clouds outside. He speculates that outside. He speculates that there is LOW air pressure. there is LOW air pressure. What instrument should he What instrument should he

use to determine the air use to determine the air pressure?pressure?

BAROMETER!BAROMETER!

What instrument should be What instrument should be used to measure the amount used to measure the amount of rainfall that has fallen in of rainfall that has fallen in

your neighborhood over the your neighborhood over the past two weeks?past two weeks?

RAIN GAUGE!RAIN GAUGE!