Layers
It's a layer of gases surrounding a planet.
This is the percentage of nitrogen in the dry air around us.
78%
Harmful substances that enter the air, water, or soil.
A barometer is used to measure changes in what?
Air Pressure
What is the square root of 4,489?
67
This is the atmospheric conditions at a specific time or place.
Weather
Which two gases make up 99% of the dry air in the atmosphere?
Nitrogen and Oxygen
Most pollution in the atmosphere comes from this.
Humans (Motors, burning fossil fuels, industry, factories)
Why is air pressure greatest at sea level?
Sea level is the lowest point on Earth. Gravity pulls the gases down and the layers sit on top of each other. The bottom layer will be the most squished down due to this.
These are two ways that atmosphere makes life suitable here on Earth.
- Provides oxygen
- Protects from harmful U.V rays.
Starting from Earth's surface, name the layers of the atmosphere in the correct sequence.
Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere. (Ionosphere can go in between Thermo and Exo)
In what climate would water vapor percentages be the highest?
Tropical Climate
What is acid rain?
Rain that is more acidic than normal due to nitrogen and sulfur oxides entering the atmosphere.
Why is air pressure and density so low in the exosphere?
Name two gases that are in dry air that we do not consider to be highly important.
(Nitrogen, Oxygen, Carbon Dioxide, Water Vapor, Argon)
Xenon, Krypton, Neon, Hydrogen, Helium
Upon entering the stratosphere, describe the temperature you would experience as you continue to climb in altitude.
The temperature would initially be cold, but because of the Ozone layer, the stratosphere would continue to warm up until you reached the top.
Nitrogen, Oxygen, Carbon Dioxide, and Water Vapor.
(Argon, but not as important to us).
Give two examples of air pollution that occur naturally.
Volcanoes, Forest Fires, Wind Erosion, Salt From Ocean.
What happens to air density and pressure as you go up a high mountain?
Air density decreases AND air pressure decreases.
What causes the Northern lights? What layer does it occur in?
They are caused by solar energy reacting with ions in the ionosphere, or the lower thermosphere.
What is the coldest layer of the atmosphere? What is the hottest?
(Out of the big four)
Mesosphere is the coldest.
Thermosphere is technically the hottest.
What are two reasons why nitrogen is vital to living things?
- Production and reproduction of cells.
- Essential for the formation of proteins.
Give 5 examples of air pollution that only occur because of humans.
(Motor vehicles only count for one)
- Motor vehicles
- Factories
- Power Plants
- Sewage Treatment
- Farms
- Cities
- Oil/Gas fields
On a warm, summer afternoon, the pressure reading on the barometer starts to decrease. This indicates that...
A storm, or poor weather, is approaching.
Describe why you would feel cold in the Exosphere even though temperatures would read over 500 degrees Celsius.
The air molecules are spread out more than 10 km at times, meaning the air molecules can't transfer their heat to your body.
(High temperature, not high heat)