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Mr. Bloom's Semester 1 vocab

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Question
Answer
Model   representation or explaination of something that shows how it looks or works.  
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collaboration   working together  
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consensus   everyone agrees  
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PHEOC   Problem- state the problem ............. Hypothesis- make an educated guess ...........Experiment- test of the hypothesis.......... Observe- analyze data........ Conclusion- answer hypothesis( might have to start over)  
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siphon   tube that moves liquid using gravity  
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conceptual model   math,words, or drawings to explain how something works or is built  
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physical model   real model that can be tested  
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circuit   unbroken pathway that electricity flows through  
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switch   device that opens and closes a circuit  
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axle   rod connecting wheels  
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bering   device that allows axle to turn  
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friction   force that resists motion  
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design # 1   product- plan for making something(n)  
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design # 2   process of figuring out how to make something(v)  
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engineers   people who design things  
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wheel   a disk that turns around a central axis  
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traction   friction between wheels and a surface  
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matter   anything that -takes up space & has mass  
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atoms   smallest unit of matter  
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molecules   atoms combined together  
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element   substance with one type of atom  
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atomic #   number of protons in the nuclues  
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thermal energy   total energy of the particles that make up matter  
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heat   flow of energy from warmer to cooler matter  
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temperature   average motion of the particles of an object  
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Water boils at ___ degrees F. and ___ degrees C.   212 F. & 100 c.  
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Water freezes at ___ degrees F. and ___ degrees C.   32 F. & 0 C.  
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melting   solid becoming a liquid  
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freezing   liquid becoming a solid  
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evaporation   liquid becoming a gas  
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condensation   gas becoming a liquid  
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solute   a substance that is dissolved  
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solvent   substance that dissolves other materials  
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dilute   describes a solution with a small amount of solute compared to the amount of solvent  
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concenrated   decribes a solution with a large amount of solute compared to the amount of slvent  
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reactant   a substance that overgoes a chemical reaction often by combining with another substance  
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product   the substance that is formed in a chemical reaction  
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exothermic reaction   a chemical reaction in which more energy is given off than taken in  
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endothermic reaction   a chemical reaction in which more energy is taken in than given off.  
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formula   arrangement of symbols that shows both the kinds and number of atoms in a compound  
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chemical equation   an arrangement of symbols and formulas used to show what happens during a chemical reaction  
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acid   a compound that releases hydyogen ions in water  
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base   a compound that releases hydroxide ions when dissolved in water  
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pH scale   a set of numbers between 0 and 14 used to measure the strength of acids and bases  
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indicator   a substance that changes color at a certain range of pH values  
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neutralization   a process in which an acid and a base react to produce a salt and water  
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chemical reaction   process in which new substances with new properties form  
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