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31 Cards in this Set
- Front
- Back
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Atoms
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The basic principle of which all elements are made
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Molecule
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Two or more atoms held together in a chemical bond
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Element
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A pure substance that has specific physical and chemical properties
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What are some examples of elements?
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Copper, aluminum, oxygen, hydrogen
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Compound
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A pure substance made or 2 or more elements chemically combined in a set ratio.
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What is a compound represented by?
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A chemical formula (Salt= NaCL, Water= H20)
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Mixture
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Two or more substances in the same place, but not chemically bond
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Homogeneous Mixture (Solution)
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A mixture of substances so evenly mixed that you can't see the different parts |
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What are some examples of a Homogeneous mixture?
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Chocolate Milk, or a brownie
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Heterogeneous Mixture
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A mixture of substances where you can see the individual parts |
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What are some examples of a Heterogeneous Mixture?
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Salad, or granola
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Chemical Energy
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The energy stored in the chemical bonds of atoms
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Density
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The mass of a material in a given volume
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What is the formula to find Density?
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Density= Mass/ Volume
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Mass
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The measurement of the amount of matter in an object (Mass does NOT vary with location)
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Volume
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The amount of space that matter occupies
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Weight
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A measure of the force of gravity on an object (Weight varies with location)
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Conservation of Matter
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Matter is never created or destroyed in any chemical or physical change
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Matter
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All matter has volume and mass (It can be weighed and takes up space)
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What are the two types of changes in matter?
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Physical and Chemical
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What are the two types of PHYSICAL changes in matter?
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Change of state and change in form
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In matter, what are changes of state?
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Bose Einstein Condensate- solid- liquid- gas- plasma
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In matter, what are changes in form?
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Breaking, crushing, shopping, filtration, melting, or freezing
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Temperature
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The measure of the average energy of random particles of matter
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Thermal Energy
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The total energy of all the particles in an object |
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Which way does Thermal Energy flow?
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Warmer to Cooler matter
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Chemical Energy
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Potential energy held in the bonds between atoms
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Endothermic Change (Enter) |
Energy taken in (This feels cold)
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Exothermic Change (Exit) |
Energy is released (This feels hot)- think fire
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What does every chemical or physical change include?
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A change in energy
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What are the two things that are NOT matter?
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Energy (Light, Heat, Sound) and Spirit
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