Weather All the vocabulary students will need to know for our Weather Unit

Question Answer
Layer of gases that surrounds a planet or star. Atmosphere
Column of air pushing down on the Earth surface with force due to gravity. Air Pressure
The first layer of Earth's atmosphere where weather is created. Troposphere
The second layer of Earth's atmosphere which is dry and less dense than the first. Stratosphere
The third layer of Earth's atmosphere that contains chemical which absorb energy from the sun. Mesosphere
Atmospheric layer that is known as the upper atmosphere due to space shuttles and satellites orbiting Earth with in this layer. Thermosphere
Atmospheric layer that has no definite other boundary due to it merging with space. Exosphere
Earth's blanket of gases that traps heat to keep the planet warm. Greenhouse Effect
An atmospheric layer found with in the stratosphere that contains ozone gas. Ozone layer
A mixture of gases that creates the Earth's atmosphere. Air
The most abundant element (gas) in the Earth's atmosphere that is needed for plants to grown. Nitrogen
Makes up only 21% of the Earth's atmosphere but this element (gas) is important to the survival of life on earth. Oxygen
The gaseous state of water found in the atmosphere. Water Vapor
A waste gas found in the atmosphere but plays a vital role in photosynthesis. Carbon Dioxide
Unique oxygen molecules that absorbs much of the sun's harmful ultraviolet radiation. Ozone
Harmful radiation from the sun. Ultraviolet Radiation
The atmospheric layer where electrically charged ions can be found that reflect radio waves and all for long distance communication. Ionosphere
Column of air pushing down on the Earth surface with force due to gravity. Atmospheric Pressure
A natural phenomenon characterized by the appearance of reddish and greenish light in the sky, usually near the northern or southern magnetic pole. Aurora Borealis
The nature of something's ingredients. Composition
An instrument measuring atmospheric pressure, used especially in forecasting the weather and determining altitude. Barometer
A person who studies and forecasts the weather. Meteorologist
Energy rays from the Sun. Solar Energy
When energy transfers from one place to another by direct contact. Conduction
Heat can transfer to other objects through LIQUIDS and GASSES Convection
Heat can be transferred from one place to another by three methods: conduction, convection and radiation. Heat Transfer
Heat transfers to other objects by ELECTROMAGNETIC WAVES Radiation
Electrically charged atoms or molecules with missing electrons. Ions
The process by which water changes from a liquid to a gas or vapor. Evaporation
The change of the physical state of matter from gas phase into liquid phase, and is the reverse of evaporation. Condensation
The fall of water, ice, or snow deposited on the surface of the Earth from the atmosphere. Precipitation
Water, from rain, snow melt, or other sources, that flows over the land surface. Run-off
The cycle of processes by which water circulates between the earth's oceans, atmosphere, and land, involving precipitation as rain. Water Cycle
The process where plants absorb water through the roots and then give off water vapor through pores in their leaves. Transpiration
The slow movement of water through the pores in soil or permeable rock that become part of earth’s aquifers. Percolation
The instrument that is used to measure humidity Psychrometer
The amount of water vapor in the air. Humidity
A flat, hazy, featureless clouds of low altitude varying in color from dark gray to nearly white. Stratus
Puffy clouds that sometimes look like pieces of floating cotton. Cumulus
The most common form of high-level clouds that are thin and often wispy. Cirrus
A dense towering vertical cloud associated with thunderstorms and atmospheric instability. Cumulonimbus
The transfer of heat by the mass movement of heated particles into an area of cooler fluid (air). Convection Current
A large body of air defined by its temperature and water vapor content that covers hundreds of square miles. Air Mass
A large body of air that forms over water and is usually high in humidity. Maritime Air Mass
A large body of air that’s temperature is warm. Tropical Air Mass
A large body of air that’s temperature is cold. Polar Air Mass
A large body of air that forms over land and is usually low in humidity. Continental Air Mass
The boundary of an advancing mass of cold air, in particular the trailing edge of the warm sector of a low-pressure system. Cold Front
The boundary of an advancing mass of warm air, in particular the leading edge of the warm sector of a low-pressure system. Warm Front
A pair of air masses, neither of which is strong enough to replace the other. Stationary Front
Are dry, cold prevailing winds that blow from the high-pressure areas of the North and South Poles towards low-pressure areas within the Prevailing Westerlies. Polar Easterlies
These prevailing winds blow from the west to the east moving from the 35 degrees latitude towards the poles. Prevailing Westerlies
Wind blowing steadily toward the equator from the northeast in the northern hemisphere or the southeast in the southern hemisphere. Trade Winds
A windless area located at the equator. Doldrums
A violently rotating column of air touching the ground, usually attached to the base of a thunderstorm. Tornado
A large tropical storm system that forms over large bodies of warm water with high-powered circular winds. Hurricane
The average course or condition of the weather at a place usually over a period of years as exhibited by temperature, wind velocity, and precipitation. Climate
A gradual increase in the overall temperature of the earth's atmosphere. Global Warming

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