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Bonnie Branch 6th grade - Air & the Atmosphere

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Term
Definition
Matter   Anything that has mass and takes up space (has volume)  
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Mass   Amount of matter in something  
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Density   Amount of matter in a given space / volume  
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Gravity   Force of attraction that exists between all objects in the universe  
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Atmosphere   Envelope of gases that surrounds Earth  
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Cellular respiration   Process by which a cell releases energy from food molecules  
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Troposphere   The lowest layer of the atmosphere / where weather occurs / temperatures decrease with altitude  
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Stratosphere   The second layer of the atmosphere / ozone layer located in the upper stratosphere / temperatures increase with altitude  
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Mesosphere   Third layer of the atmosphere / where most meteoroids burn up / temperatures decrease with altitude (coldest layer)  
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Thermosphere   Upper layer of the atmosphere / temperatures increasing with proximity to the sun / air has very low density  
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Radiant energy   Energy given off by the sun that can travel through empty space  
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Radiation   Movement of the Sun’s energy through empty space  
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Conduction   Transfer of heat through matter by direct contact  
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Convection   Process by which heat is transferred through a liquid or a gas  
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Pressure   Amount of force per unit of area  
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Barometer   Instrument used to measure air pressure  
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Wind   The horizontal movement of air  
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Air current   Up-and-down movement of air  
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Wind vane   Instrument that indicates wind direction  
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Anemometer   Instrument that measures wind speed  
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