Slide 1

FACTORS INFLUENCING WEATHER SC.5.E.7.4 Distinguish among the various forms of precipitation (rain, snow, sleet, and hail), making connections to the weather in a particular place and time. SC.5.E.7.3 Recognize how air temperature, barometric pressure, humidity, wind speed and direction, and precipitation determine the weather in a particular place and time.. Slide 2 What is weather? The condition of the atmosphere at a particular place and time. Slide 3 Factors Determining Weather Air Temperature Barometric Pressure Humidity Wind Speed and Direction Precipitation Slide 4 AIR TEMPERATURE Due to the unequal heating of the atmosphere by the Sun Measured using a THERMOMETER Cloud cover affects the temperature of the air Slide 5 AIR PRESSURE The measure of the weight of gases in the atmosphere Measured using a BAROMETER The pressure decreases as the altitude increases There is more evaporation when the air pressure is low Slide 6 HUMIDITY The amount of water vapor or moisture content in the air at a specific time Measured using a HYGROMETER Determines the likelihood of precipitation, dew, or fog Slide 7 WND SPEED AND DIRECTION Wind is caused by the uneven heating of the Earth causing air to flow from high pressure to low pressure zones Wind speed is measured using a ANEMOMETER Slide 8 PRECIPITATION The falling of water from the atmosphere to the surface of the Earth Temperature, pressure, and humidity affect the rate of precipitation. Reaches the ground in the form of solid or liquid water Slide 9 FORMS OF PRECIPITATION Rain Snow Sleet Hail Slide 10 RAIN Precipitation in the form of falling liquid drops most common type of precipitation in our atmosphere measured in millimeters using a RAIN GAUGE Slide 11 SNOW Precipitation falling from clouds In the form of ice crystals Forms when water vapor turns into ice without passing through a liquid state Measured in inches with a RULER Slide 12 SLEET A mixture of rain and snow Raindrops that freeze on their way down to the Earths surface Measured in inches with a RAIN GAUGE Slide 13 HAIL Precipitation in the form of spherically shaped pieces of ice larger than five millimeters in diameter Measured in inches with a RAIN GAUGE Slide 14 CLOUDS A collection of tiny water droplets or ice crystals floating in the atmosphere at varying altitudes Slide 15 CIRRUS CLOUDS Found at high altitudes made up of tiny ice crystals Slide 16 CUMULUS CLOUDS White, puffy clouds that are referred to as "fair-weather clouds" Slide 17 STRATUS CLOUDS Uniform grayish clouds that often cover the entire sky. Slide 18 CUMULUS CLOUDS Thunderstorm clouds that are only found at low altitudes