click below
click below
Normal Size Small Size show me how
weather
Term | Definition |
---|---|
weather | the condition of earths atmosphere at a particular time and place |
meteoroligist | scientist who study the cause of weather and try to predict it |
forecast | a prediction of what the weather will be in the future |
tempature | the average amount of energy of motion in the molecules of a substance |
convection | the transfer of heat by movement of fluid |
humidity | a measure of the amount of water vapor in the air |
relative humidity | the percentage of water vapor in the air compared to the maximum amount the air can hold at that tempature |
wind | the horizontle movement of air from an area of high pressure to an area of lower pressure to an area of lower pressure |
cumulus | clouds that form less than 2 kilometers above the ground and look like fluffy rounded piles of cotton |
stratus | clouds that form in flat layers |
cirrus | wispy,feathery clouds made mostly of ice crystals that form at high levels,above about 6 kilometers |
thermometer | an instrument used to mesure tempature,consisting ofthin,glass tubes with a bulb on one end thatcontains a liquid |
anemometer | an instrument used to mesure wind pressure |
phychrometer | an instrument used to measure relative humidity,consisting of a wet-bulb thermeter and a dry-bulb thermometer |
air mass | a huge body of air that has simular tempature,pressure,and humidity throughout |
front | the area where air masses meet and do not mix |
cold front | when a cold air masses pushes against a warm air mass |
warm front | when a warm air mass pushes against a cold air mass |
tornado | a rapidly whirling,funnel-shaped cloud that reaches down from a storm cloud to touch earths surface leaving a destructive path |
hurricane | a tropical storm that has wind of 119 km per hour or higher typically about 100 km across |