| A | B |
|---|
| weather | the condition of Earth's atmosphere at a particular time or place |
| atmosphere | the envelope of gases that surround the planet |
| ozone | the form of oxygen that has three oxygen atoms in each molecule rather than two |
| water vapor | water in the form of gas |
| earth's atmosphere | a THIN layer of gases that surround our planet |
| gases and particles making up the atmosphere | nitrogen, oxygen, carbon dioxide, water vapor, argon, as well as particles of liquids and solids |
| nitrogen | MOST ABUNDANT gas in the atmosphere |
| nitrogen | makes up a little more than 3/4 of the air that we breathe |
| oxygen | second most abundant gas in the atmosphere |
| oxygen | makes up less that 1/4 of the volume of gases in the atmosphere |
| oxygen | most molecules have to atoms |
| ozone | has three oxygen atoms |
| pungent smell in the air after a thunderstorm | ozone |
| nitrogen and oxygen | together make up 99% of the gases in the lower atmosphere |
| carbon dioxide | essential to life |
| carbon dioxide | plants need to make food |
| animals give off this gas | carbon dioxide |
| too much carbon dioxide | destroying the ozone layer |
| air in the atmosphere | contains water vapor |
| water vapor | amount in the air varies from place to place |
| pure air | exists only in labs |
| air | contains particles of dust , smoke, salt, and other chemicals |
| atmosphere | contains oxygen and other gases that all living things need to survive |
| atmosphere | traps energy from the sun, and keeps most of Earth's surface warm enough for water to exist as a liquid |
| atmosphere | protects living things from dangerous radiation from the sun |
| atmosphee | prevents Earth's surface from being hit by most meteorids, or rocks from outer space |
