Term
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Definition
| the group that does not receive special treatment |
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Term
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Definition
| the group that receives special treatment |
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Term
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Definition
| the variable that is changed on purpose |
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Term
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Definition
| the variable that you are measuring |
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Term
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Definition
| the variables that remain the same each time the experiment is conducted |
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Term
| the law of conservation and mass |
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Definition
| matter is neither created nor destroyed, therefore, in a chemical reaction the reactants and products must be equal in number |
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Term
| non-point source pollution |
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Definition
| pollution that is difficult to identify the source, such as run-off from fertilizers, litter, and erosion |
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Term
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Definition
| the negatively charged particle on the outside nucleus of an atom |
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Term
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Definition
| the positively charged particle found within the nucleus of an atom |
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Term
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Definition
| the particle with no charge found within the nucleus of an atom |
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Term
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Definition
| a change that produces a whole new substance |
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Term
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Definition
| a change in appearance only |
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Term
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Definition
| a chemical reaction in which energy in the form of heat is absorbed |
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Term
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Definition
| a chemical reaction in which energy in the form of heat is released |
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Term
| proper structure for a chemical equation |
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Definition
| reactant + reactant --> product |
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Term
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Definition
| evaporation, condensation, precipitation, runoff, transpiration |
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Term
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Definition
| the over abundance of fertilizers which cause algal bloom and then the decay of underwater grasses |
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Term
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Definition
| a mixture of dissolved substances mixed evenly throughout a solvent |
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Term
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Definition
| show the number of protons or the number of electrons in an element (number written above the symbol on the periodic table) |
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Term
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Definition
| shows the sum of the number of protons and neutrons in an element that tells how heavy an element is (number written below the symbol on the periodic table) |
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Term
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Definition
| 2 or more elements chemically combined |
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Term
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Definition
| a mixture in which all material is dissolved and evenly spread throughout |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| measures how acidic or basic a substance is on a scale of 0 - 14 |
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Term
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Definition
| energy that is stored and held in readiness |
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Term
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Definition
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Term
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Definition
| underground layer of soil or rock that contains water |
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Term
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Definition
| process of removing salt from ocean water to make it usable for humans |
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Term
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Definition
| the splitting of an atom's nucleus into 2 nuclei = nuclear energy |
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Term
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Definition
| climate, temperature, precipitation |
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Term
| most weather occurs in the: |
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Definition
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Term
| winds circulate because of: |
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Definition
| air moving in to replace the air that sank or rose |
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Term
| temperature can be affected by: |
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Definition
| latitude, altitude, proximity to a large body of water |
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Term
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Definition
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Term
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Definition
| an attempt to predict the weather |
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Term
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Definition
| sinking or rising air masses |
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Term
| warm air over land & cool air over the sea cause: |
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Definition
| "sea breezes" which blow from the sea toward the land |
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Term
| a cold front may form with: |
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Definition
| the approach of a cooler air mass and an increase in air pressure |
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Term
| problems associated with burning fossil fuels: |
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Definition
| they do not burn clean and cause air pollution, acid rain, smog, global warming, & greenhouse effect |
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Term
| Why is it important to manage use of fossil fuels carefully? |
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Definition
| there is a limited amount that will run out some day & they cause pollutants |
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Term
| What are some alternative energy sources that could be used instead of fossil fuels? |
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Definition
| hydropower, solar energy, wind |
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Term
| A flashlight converts chemical energy into: |
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Definition
| electrical energy, which is then converted into radiant energy |
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Term
| Photosynthesis uses ______________ energy to convert sunlight into food for plants |
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Definition
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Term
| Stored chemical energy that can be burned is a: |
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Definition
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Term
| No machine is 100% efficient because: |
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Definition
| some energy is lost as heat |
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Term
| solutes will dissolve faster when they are ___________ |
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Definition
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Term
| A solution will dissolve more material by ________________ it. |
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Definition
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Term
| Saltwater is an example of a _____________ |
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Definition
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Term
| examples of physical change are: |
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Definition
| freezing, boiling, melting, chopping, cutting |
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Term
| examples of chemical change are: |
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Definition
| burning, exploding, decomposing, & rusting |
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