| A | B |
|---|
| weight | measure of the force of gravity on an object |
| Volume | the amount of space that matter occupies |
| Mass | the amount of matter in an object |
| atmosphere | the envelop of gases that surrounds the planet |
| aneroid barameter | instrument used to measure air pressure that has an airtight metal chamber sensitive to changes in air pressure |
| weather | condition of Earth's atmposhere at a particular time and place |
| 4 gases in dry air | nitrogen, oxygen, carbon dioxide and argon |
| water vapor | water in the form of a gas |
| What parts of the atmosphere interact? | sun, air, temperature and wind |
| density | amount of mass in a given volume of air |
| density equation | Mass divided by its volume |
| air pressure | result of the weight of a column of air pushing on an area |
| barometer | instrument used to measure air pressure |
| 2 instruments that measure air pressure | Mercury and aneroid barometer |
| altitude | elevation- distance about sea level |
| 4 main layers of atmosphere | troposphere, stratosphere, mesosphere, thermosphere |
| troposphere | where weather occurs |
| troposphere | altitude increases temperature decreases |
| stratosphere | contains ozone layer |
| mesosphere | protects surface from meteroids |
