| A | B |
| median | the middle number when the data in order |
| mode | number that ocures most offen in your data |
| range | the difference in the highest and the lowest number |
| air pressure | the amount that air pushes on anything |
| low-pressure area | a place were warm air rises and pushes down on the earth's surface with less pressure s |
| high-pressure area | a place were cold air pushes down on earth's surface with more pressure |
| barometer | a tool that measures air preasure |
| wind vain | a tool that measures wind direction |
| anemometer | a tool that measures wind speed |
| precipitation | moisture that falls from clouds to the ground |
| rain gauge | a tool that measures precipitation |
| humidity | the amount of water vaper in the air |
| hygrometer | a tool that measures humidity |
| cumulous clouds | warm, moist air;dome shaped, moves high in the sky |
| cirrus | feather like, thin threads; temperature is cold |
| stratus | low, flat -wide layers |