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Boys Earth science

TermDefinition
Ocean A large body of salt water (H2O).It covers about 70% of Earth Surface.
Evaporation The changing of a liquid into gas.
Ice Sheet a large covering of ice and snow that lasts a long time.
Fresh Water Water (H2O) that has little or no salt.
Water Vapor Water (H2O) in the form of an invisible, odorless gas.
Glacier A large body of ice that moves slowly over land.
Clouds Are made up of tiny H2O droplets or ice crystals.
Sea Breeze The movement of air form water to land.
Land Breeze the movement of air from land to water.
Condensation The changing of a gas into a liquid.
Water Cycle The continuous movement of water from a liquid state or the ground to a vapor state in the air and back again.
Precipitation Water droplets that form in the atmosphere and fall to the ground.
Fog A Stratus cloud that forms near the ground.
Reservoir A human-made lake that is used to store water.
Dam A barrier that prevents the normal flow of water.
Groundwater Water beneath earths surface.
Aquifer An underground layer of rock that can hold water.
Flood The overflow of water onto land.
Contaminate or Pollute To make dirty or impure.
Safe Drinking Act-1974 A law to make drinking water safe
Clean Water Act-1977 makes it illegal to throw pollutants into surface water... (streams, river, lake, ocean)
Water Shed The area where water drains into a river. ( California has 10)
Groundwater Water beneath earths surface
Dam A barrier that prevents the normal flow of water.
aquifer an underground layer of rock that can hold water
reservoir a human made lake that is used to store water
aqueduct a pathway built by people
drought a long period of dry weather
reclamation making something usable again
conservation save something to be sure there is enough
air pressure Air pressing onto a surface
altitude how high something is above earth's surface
humidity The amount of water vapor in the air
troposphere The layer of earth's atmosphere closest to the surface
atmosphere All of the air surrounding the earth
barometers Tools use to measure air pressure
The angle of sunlight 180, 150, 120, 90, 120, 150, 180.
Direct and Slanted Beams of Light 90, 120, 150, 180.
global winds winds that blow in predictable directions over long distances all the time.
convection Heat going from one place to another through movement of a gas or liquid.
Climate climate is the average weather condition of a place.
current A current is the ongoing movement of ocean water
El Nino When the wind blow Toward the Americas. They push moist air, heavy rains, and storms onto the wast coasts of N and S America. This happens every 2-7 years.
Air Mass A large amount of air that has similar temperature and humidity thoughout
Monsoon A seasonal wind that brings heavy rain-South east Asia
front The meeting place between two air mass
Thunderstorm A storm that includes rainy thunder and lightning
Cyclone A storm with low pressure at its center and spinning winds. Ex. tornado- overland........hurricane-over water
3 Steps to a Thunderstorm 1. Cold front 2. thunderheads 3. precipitation falls
Storm Surge A large rise in the ehight of ocean water caused by a hurricane
Tornado Alley The part of the U.S. where cold, dry air form Canada meets warm, moist air formt he Gulf of Mexico.
Hurricane Is a very large spinnig storm with winds over 73 mph
How a Tornado Forms 1 Thunderhead- Warm air moves upward 2 Funnel Cloud- is formed when air starts spinning in the cloud 3 Tornado-the tunnel cloud touches the ground it becomes a tornado
Tornadoes is a spinning cloud shaped like a funnel, with winds up to 299 mph.
Low Pressure Closure An area of low pressure surrounded by an area of high pressure
Meteorologist A scientist who specializes in the study of Earth's atmosphere and weather
Forecast To make a guess a about what may happen based on careful observation
Weather Map A map that shows weather conditions over an area at a given time.
Popular Earth Science sets

 

 



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