Chapter 17

what produces a variety of weather?
combination of earth’s motion and energy from the sun
what is climate base on?
climate is based on observations of weather that have been collected over many years.climate helps describe a place or region.
what is air a mixture of?
air is a mixture of different gases and particles each with it’s own physical properties. the composition of air varies from time to time and from place to place.
what two gasses make up 99 percent of air?
nitrogen and oxygen make up 99 percent of the volume of clean dry air
what gas plays a significant role in heating the atmosphere?
carbon dioxide is an active absorber of energy given off by earth.therefore it plays a significant role in heating the atmosphere.
what isi the source of all clouds and precipitation?
water vapor is the source of all clouds and precipitation.