Weather introduction

Weather and Climate

Weather/Climate

http://video.nationalgeographic.com/video/science/earth-sci/climate-weather-sci/

Climate

Climate is what the average weather conditions of a place over a long period of time.

Weather

Weather is the conditions of the atmosphere at any given place at any given time. Weather happens in the lowest part of the atmosphere called the troposphere.

The weather conditions are measured using special tools or instruments.

Meteorologists are scientist who study and report the weather.

Factors that influence weather

Temperature Wind Speed and

Direction Air Pressure Humidity Precipitation

Weather

Tools

WEATHER TOOLSVIDEO

http://www.youtube.com/watch?v=fyhEiazvHLw

Thermometer

A thermometer measures the amount of heat energy in the air. Temperature makes different kinds of precipitation fall. When it is above 32 F degrees or 0 degrees C , it rains. When it is

below below 32 degrees F or 0 degrees

degre C it will sleet or snow.

Temperature is measured in Fahrenheit or Celsius.

Wind Vane

A wind vane measures the

direction the wind is coming

from. The fin is pushed by the

wind, causing the pointed end to

point in the direction the wind is

coming from. Wind direction

tells us what direction weather

is moving in. Wind direction is measured as North, South, East, or West.

AnemometerAn anemometer measures the speed of the

wind. Wind speed is caused by differences in air temperature and air pressure.

Wind speed is measured in Miles per hour or Kilometers per hour.

Barometer

A barometer measures airpressure. Rising air pressure usually means fair weather. falling air pressure usually means cloudy, rainy conditions. The lower the reading the stormier it is.

Air pressure is measured in millibars.

Here’s how to REMEMBER it!

When the barometer is we

Because we get to go

When the barometer is

We

Because we have to stay

Hygrometer

A hygrometer measures the amount of water vapor that is in the air. We call this humidity. When it is more humid, you feel sticky and hotter. When it is 100% humidity, the sweat on your body cannot evaporate so you feel hotter. It is the evaporation of your sweat that helps cool your body. So be careful on a humid day. You could over heat easily!

Rain GaugeA rain gauge is used to measure the amount of precipitation that falls. You can measure the amount of rain in inches or centimeters using any kind of cylinder. You can measure the amount of snow that falls using a ruler in inches or centimeters.