Up in the Air
What is atmosphere
The pressure the atmosphere exerts on all objects within it
What is atmospheric pressure
The gas molecules that make up our atmosphere are densest near what?
The transfer of heat energy by waves through air or empty space
What is radiation
The Earth's atmosphere is divided into two regions
What are the homosphere and heteroshphere
Air is a mixture of these
What are nitrogen, oxygen, argon, carbon dioxide, water vapor, and other gases
What measures atmospheric pressure
What is a barometer
As the altitude increases the depth of the air above it does what?
What is decreases
The transfer of heat energy through a liquid or gas by currents
What is convection
The 5 distinct layers of the atmosphere
What are the troposphere, stratosphere, mesosphere, thermosphere, and exosphere
Two gases in our atmosphere that are essential for life
What are oxygen and carbon dioxide
Air pressure varies depending on the concentration of gases in the air due to what?
What is weather and air temperature
Mount Everest has an altitude of 8.8 k. What is it's psi level?
What is 4.5 psi
This is kinetic energy that flows from one object to another
What is heat
This is a very active region of the atmosphere where solar radiation ionizes gases
What is the ionosphere
Earth gets warm when it absorbs what?
What is light
What units are used to measure atmospheric pressure?
What are atmospheres (atm) and pounds per square inch (psi)
Why do athletes who are used to playing sports in low altitudes find it hard to play sports in high altitudes?
The density at that altitude is 90% of the amount at sea level, so they must breathe harder to get the amount of oxygen they are accustomed to.
A measure of the energy of random motion in a substance's molecules
What is temperature
These are the result of high-energy collisions between ionized particles in the ionosphere that are affected by the magnetic fields of both Earth and the Sun.
What are auroras
What two gases make up 99% of dry air?
What are nitrogen and oxygen
The atmosphere at sea level exerts how much pressure?
How many pounds per square inch (psi) of pressure are in 1 atmosphere (atm)?
There is 1.0 atmosphere of pressure at sea level. That is equivalent to 14.7 pounds per square inch of pressure (OYO Question)
If the molecules of a substance are moving faster than those of the themometer what happens to the energy?
The energy will be transferred from the molecules of the substance to those of the thermometer.
What are some ways that scientists are currently learning more about the solar system?
Scientists are gathering more information about the solar system through piloted spacecrafts, unpiloted space probes, and telescopes.