Presentation on theme: "Katina Peck 7th Grade Science"— Presentation transcript:
1Katina Peck 7th Grade Science Be a Weather WatcherKatina Peck7th Grade Science
2Weather What the outside air is like at a certain place and time. Weather can be described as:How hot or cold it is,How wet or dry it is,How many clouds are in the sky, andHow windy it is.
3ClimateWhat the weather of a place is like over a long time. Just think how the weather is different for each season of the year. Lots of different things can affect what the climate is such as:How much sunlight, wind and water a place gets,Mountains, oceans and rivers that are in an area,What the soil is like, and the kind of plantsthat are growing.
4MeteorologistScientists who study weather and climate are called meteorologists.Meteorologists measure a lot of different things that make up the weather such as:PrecipitationWindTemperature
5Precipitation Humidity The amount of rain and/or snow that falls. The amount of water in the air.
6WindMeteorologists study what direction the wind is coming from and how fast the wind is blowing.
7Temperature The temperature of the air. The temperature of the ground/soil.The temperature of water (oceans and lakes).
8Technology Satellites Computers Barometers Thermometers Rain gauges Orbits Earth taking pictures of clouds from space.ComputersUse data to create forecasts.BarometersMeasures air pressure.ThermometersMeasures temperature.Rain gaugesMeasures precipitation.AnemometerMeasures wind speed.RadarUses radio signals to determine where precipitation is falling and how fast clouds are moving.
9Air PressureAir pressure depends on the density of air, or how close together its molecules are.Air lower in the atmosphere is more dense than air above, so air pressure down low is greater than air pressure higher up.Temperature affects air pressure:In cold air, the molecules are more closely packed together.In warm air, the molecules are further apart.Cold air is denser!!!
10Rising and Sinking of Air Warm air is less dense, so it rises.Cold air is denser, so it sinks.
11WindWind often moves from areas where it’s colder to areas where it’s warmer.The larger the temperature difference, the stronger the wind.