Transcript Weather
Weather Objectives • After this lesson, you will: – Know different types of weather – Understand the weather forecasts you see on T.V. – Be able to identify different types of clouds – Be able to identify different types of precipitation – Know what causes our weather – Be able to read weather maps – Know about the water cycle – Know about different types of storms Types of Weather o There are many different types of weather, and the weather changes every day Sometimes it might be sunny Sometimes it might be cloudy Sometimes it might be rainy Sometimes it might be windy Sometimes it might be stormy o What is the weather like outside today? Is it a nice day? Weather Forecasts • Meteorologists (me-tee-or-ahl-oh-jists) – Scientists who study the weather – Help tell what kind of weather is coming • The Weather Channel – Local Forecast Types of Clouds Cirrus Stratus Cumulus Nimbus Precipitation Precipitation is a huge word for moisture falling from the sky. Moisture can fall from the sky in many different forms. rain sleet hail snow The kind of precipitation that falls depends on the temperature of the air. What Causes our Weather? • Air Masses – All air moves in what are called masses – All places that are covered by the same large air masses have the same weather – The temperature of these places is about the same – Storms occur when air masses meet • Air Fronts – The places where cold and warm air masses meet are called fronts – Cold fronts often bring showers – Warm fronts almost always bring rain or snow Weather Maps The Water Cycle Violent Storms Thunderstorm Hurricane ~Storms with heavy rains and strong wind are called thunderstorms~ ~Powerful thunderstorms can produce small, violent storms called tornadoes~ ~Storms that form near the equator, over the warm oceans, are called hurricanes~ ~Some storms have very cold winds and heavy snow, called blizzards~ Tornado Blizzard Humidity • The amount of water vapor in the air • The air feels sticky when the humidity is high • Temperature-humidity index – THI • Comfortable = <70 • Uncomfortable = >80 Summary • In this lesson, you learned about: – Types of weather and weather forecasts – Types of clouds – Precipitation – What causes our weather – Weather maps – The water cycle – Violent storms Time for the Quiz If you pay attention, and ask questions…. You will do great! When you take your quiz….. Okay, it’s quiz time! Acknowledgements • Abruscato, Joseph, Joan Wade Fossaceca, Jack Hassard, Donald Peck. Holt Elementary Science. 1980, Holt, Rinehart and Winston: 92-135.