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Weather and atmosphere
chapter 2
35
Science
7th Grade
01/14/2009

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Cards

Term
Anemometer
Definition
An instrument that measures wind speed
Term
Cirrus
Definition
Wispy, feathery clouds made mostly of ice crystals that form at high levels, above about 6km
Term
Condensation
Definition
The process by which molecules of a substance
Term
Conduction
Definition
The direct transfer of heat from one substance to another substance that it is touching
Term
Convection
Definition
The transfer of heat by the movement of a fluid
Term
Coriolis effect
Definition
The way Earth's rotation makes winds in the Northern Hemisphere curve to the right and winds in the Southern Hemisphere curve to the left
Term
Cumulus
Definition
Clouds that form less than 2km above the ground and look like fluffy, rounded piles of cotton
Term
Dew Point
Definition
The temperature at which condensation begins
Term
Drought
Definition
Long Periods of low precipitation
Term
Electromagnetic waves
Definition
A form of energy that can travel through space
Term
Evaporation
Definition
The process by which water molecules in liquid water escape into the air as water vapor
Term
Global winds
Definition
Winds that blow steadily from specific directions over long distances
Term
Greenhouse effect
Definition
The process by which heat is trapped in the atmosphere by water vapor, carbon dioxide, methane, and other gases that form a "blanket" around Earth
Term
Heat
Definition
The energy transferred from a hotter object to a cooler one
Term
Humidity
Definition
A measure of the amount of water vapor in the air
Term
Infrared radiation
Definition
A form of energy with wavelengths that are longer than visible light
Term
Jet stream
Definition
Bands of high-speed winds about 10km above Earth's surface
Term
Land breeze
Definition
The flow of air from land to a body of water
Term
Latitude
Definition
A measure of distance north or south of the equator, expressed in degrees
Term
Local winds
Definition
An instrument used to measure the amount of precipitation, consisting of an open-ended can topped by a collecting funnel and having a collecting tube and measuring scale inside
Term
Monsoon
Definition
Sea and land breezes over a large region that change direction with the seasons
Term
Precipitation
Definition
Any form of water that falls from clouds and reaches Earth's surface
Term
psychrometer
Definition
an instrument used to measure relative humidity, consisting of a wet-bulb thermometer and a dry-bulb thermometer
Term
radiation
Definition
the direct transfer of energy by electromagnetic waves
Term
rain gauge
Definition
an instrument used to measure the amount of precipitation, consisting of an open-ended can topped by a collecting funnel and having a collecting tube and measuring scale inside
Term
relative humidity
Definition
the percentage of water vapor in the air compared to the maximum amount the air could hold at room temperature
Term
scattering
Definition
reflection of light in all directions
Term
sea breeze
Definition
the flow of air from an ocean or lake to the land
Term
stratus
Definition
clouds that form in flat layers
Term
temperature
Definition
the average amount of energy of motion in the molecules of a substance
Term
thermal energy
Definition
the energy of motion in the molecules of a substance
Term
thermometer
Definition
an instrument used to measure temperature consisting of thin, glass tube with a bulb on one end that contains a liquid
Term
ultraviolet radiation
Definition
a form of energy with wavelengths that are shorter than visible light
Term
wind
Definition
the horizontal movement of air from an area of high pressure to an area of low pressure
Term
wind-chill factor
Definition
increased cooling caused by the wind
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