The Atmosphere Structure and Temperature

What produces a variety of weather?
Combination of Earth’s motions and energy from the sun.
What is climate based on?
Climate is based 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 its own physical properties. The composition of air varies from time to time and from place to place.
What two gases make up 99 percent of dry 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.
What is the source of all clouds and precipitation?
Water vapor is the source of all clouds and precipitation
What are some particles that remain suspended for long periods of time?
Sea salts from breaking waves, fine soil blown into the air, smoke and soot from fires, pollen & microorganisms lifted by the wind.
When do oxygen atoms split into single atoms of oxygen?
They split when they absorb ultraviolet radiation emitted from the sun.
What does ozone absorb?
Ozone absorbs harmful UV radiation from the sun.
What accounts for nearly half the primary pollutants by weight?
Emissions from transportation vehicles.
What are secondary pollutants?
They are not emitted directly into the air.
What are photochemical reactions?
Reactions triggered by strong sunlight.
What is atmospheric pressure?
Atmospheric pressure is simply the weight of the air above.
How many layers is the atmosphere divided into?
4
In what layer do most weather phenomena occur?
Troposphere
Where does most energy that drives weather and climate come from?
Sun
What creates winds and dives the ocean’s currents?
It is unequal heating of Earth that creates winds and drives the ocean currents.
What is rotation?
Rotation is the spinning of Earth about its axis.
What is revolution?
Revolution is the movement of earth in its orbit around the sun.
What are the degrees the Earth is tilted?
23.5 degrees