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Earth Science - week 1
Earth Science - week 1
18
Science
5th Grade
11/12/2007

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Term
Aquifers 

 

Definition
 An area under the ground where there is water
Term
Carbon Cycle 
Definition
 The process in which carbon cycles between the atmosphere, oceans, and living organisms; includes the processes of photosynthesis, decomposition, and respiration
Term
Carbon Dioxide 
Definition
 A gas in the atmosphere that plants "breathe in" and use to make their own food
Term
Condensation 
Definition
 The change in a substance from a gas to a liquid 
Term
Current 
Definition
 Continuous flow of air, water, or electric charge
Term
Cycle 
Definition
 A sequence of events that reoccur over and over 
Term
Evaporation 
Definition
 The process by which a liquid becomes a gas
Term
Fertilizer 
Definition
 A mixture, usually including manure and nitrogen, which is spread on or worked into soil to increase its nutrients and supports plant growth
Term
Molecule 
Definition
 The smallest part of a substance that has all the properties of the substance
Term
Nitrogen Cycle 
Definition
 The circulation of nitrogen; nitrogen from the soil is absorbed by plants, which are then eaten by animals that digest the food and poop it out (waste) returning the nitrogen back to the soil  
Term
Nitrogen  
Definition
 The most abundant gas in the atmosphere; 78%of the atmosphere
Term
Oxygen 
Definition
 A gas in the atmosphere that animals breathe in and need to live
Term
Precipitation 
Definition
 A deposit on Earth of hail, mist, rain, sleet or snow; a result of condensation
Term
Solar Energy 
Definition
 Energy that comes from the Sun
Term
Transpiration 
Definition

 

The release of water vapor from the leaves of plants
Term
Troposphere 
Definition
 The lowest layer of Earth's atmosphere where most weather occurs
Term
Waste 
Definition
 Undigested food; poop
Term
Water Cycle 
Definition
 The process by which water is renewed and used over and over again on the Earth
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