| A | B |
|---|
| The amount of water vapor in the air | humidity |
| When water heats up and turns into a gas called water vapor | evaporation |
| When water vapor rises and reaches cooler air and condenses into tiny water droplets | condensation |
| When water droplets come together | cloud formation |
| Water droplets in clouds get too heavy and fall as rain, snow, sleet or hail | precipitation |
| Precipitation that runs into rivers and streams and eventually into the ocean | runoff |
| the precipitation that soaks into the earth and collects underground and eventually seeps into the ocean | ground water |
| The earth's air | atmosphere |
| The highest layer of air, where satellites orbit | thermosphere |
| The coldest place in the atmosphere | mesosphere |
| The layer of the atmosphere which contains the ozone layer | stratosphere |
| The clouds are in this layer of the atmosphere | troposphere |
| These are produced because the air over the equator is warmer than the air over the poles | global winds |
| During the day the land heats up faster than the ocean when the sun rises creating a... | sea breeze |
| During the night the land cools faster than the ocean creating this... | land breeze |
| The pushing of air because some air has more particles than other air | air pressure |
| Any large body of air with the same temperature and humidity throughout | air mass |
| The leading edge of an air mass | front |
| The leading edge of a cold air mass | cold front |
| The leading edge of a warm air mass | warm front |
| When two fronts lock together and stay right above your head for a few days | stationary front |
| All the earth's water is called this | hydrosphere |
| The measure of the amount of salt in water | salinity |
| The slow change in water level | tide |
| A river of water that moves through the ocean | current |
| Using sound to measure depth or to find objects in water | sonar |
| Shallowest part of the ocean | continental shelf |
| fast dropoff of the ocean floor | continental slope |
| A more gradual slope made of sediment that rolled down the continental slope | continental rise |
| The deep and flat part of the ocean bottom | abyssal plain |
| Mountain chain on the ocean floor that builds up slowly as melted rock pours out of cracks in the ocean floor | midocean ridge |
| Valley in the midocean ridge | rift valley |
| Mountain below the waves | seamount |
| A deep depression in the ocean | trench |
| fountains of hot water that spurt out of cracks in the ocean floor | thermal vents |
