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1 Ch - Phy Sc M 13A
Earth Science - Our Atmosphere and Beyond (Apologia Phys Sci M 13A)
| Question | Answer |
|---|---|
| atmosphere | the mass of air surrounding a planet |
| greenhouse effect | the process by which certain gases (principally water vapor, carbon dioxide, and methane) trap heat that radiates from Earth |
| pressure | the force (weight) applied over a unit of area |
| atmospheric pressure | the pressure exerted by the atmosphere on all objects within it |
| abbreviation for atmosphere (the measurement) | atm |
| millimeters of mercury | mmHg |
| P = F/A | force per unit of area |
| psi | pounds per square inch |
| pascal (Pa) | SI unit of pressure, named for French physicist Blaise Pascal |
| radiation | the transfer of energy by WAVES through air or empty space |
| conduction | the transfer of heat energy from molecule to molecule by CONTACT |
| convection | The transfer of heat energy through a liquid or gas by CURRENTS |
| The earth gets warm when it absorbs light, but it actually __________ __________ when it radiates light. | cools down |
| Carbon dioxide tends to ________ the infrared light that the Earth radiates. | absorb |
| If the concentration of carbon dioxide in the air is too great, the _______________________ ____________ would warm the Earth up too much, causing problems with ecological balance. | greenhouse effect |
| At sea level, the atmosphere exerts an average of | 14.7 pounds of weight on every square inch it touches. |
| Pressure pushing on a person or thing is canceled out by | pressure pushing from the opposite direction, so the pressure is not felt. |
| Evangelista Torricelli | Italian scientist, invented the original barometer in 1643 |
| 1 atm = 14.7 psi = | 760 mmHg = 29.9 in |
| If the atmospheric pressure is less than 1 atm, you know it is | less than the average sea level pressure. |
| Air pressure changes with weather and with | altitude. |
| The gas molecules that make up our atmosphere are densest near Earth's surface and become _______ ___________ as altitude increases. | less dense |
| Because air is made of gases, it can become | compressed or squished together. |
| The density of air at an altitude 1610 meters ABOVE sea level has a density of 90% of the density of air AT sea level. This means | there are FEWER oxygen molecules in the same volume of air. Athletes must breathe harder at the higher elevation to get the SAME amount of oxygen that they would AT sea level. |
| ________________________ is the most important way that heat travels in the atmosphere and is responsible for many weather conditions. | Convection |
Created by:
MrsHough
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