WEATHER REPORTING INSTRUMENTS BY LEXI GREENBERGER.

WEATHER REPORTING INSTRUMENTSBY LEXI GREENBERGER

WHAT ARE WE MEASURING?

We are measuring Wind Wind speed Wind direction

We are measuring Precipitation Rain Snow

We are measuring Air Pressure High or Low?

We are measuring Temperature Hot or Cold

Why do we measure these things?

We want to be able to predict and describe the weather It helps us plan what to wear It can help us avoid dangerous weather It can tell how to care for plants and crops

How does a thermometer work?

A thermometer is a glass tube filled with liquid, usually mercury or alcohol

The liquid expands when it is hot and shrinks when it is cool

The tube has numbers on it to tell you what the temperature is by measuring how much of the tube the liquid takes up

What is a cool way to measure wind speed at

home

The instrument used to measure wind speed is an anemometer

You can make your own anemometer by gluing a ping pong ball to a string and tying it to a protractor

By measuring the angle of the string on the protractor you can estimate the wind speed!

How do you measure precipitation

Rainfall is measured by collecting rain in a rain gauge

Rain gauges are usually about 50 cm tall and are placed on the ground just high enough to avoid splashes

Rain water is caught in a funnel on top, runs down into a cylinder below where it can be measured

How do we measure air pressure

With a Barometer

It tells you if the air pressure is rising or falling

A rising barometer pressure means sunny and dry weather

A falling barometer pressure means stormy and wet weather

SOURCES

Ehow.com

Ecokids.com

Wizkids.com

Weather by: Brian Cosgrave

THE END !!!!