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Chemistry Qiuz

7th grade Science

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Density Formula
D=m/v
Density Definition
The amount of mass there is in a certain volume of an object
Mass Definition
The amount of matter there is in an object
Characteristics of Solids
-definite shape, tightly packed atoms, atoms are attracted, small vibrations, small amount of kinetic energy
Characteristics of Liquids
-occupies the bottom of the container, still tightly packed but some jump, attracted but notalways in contact, constant vibration, K. energy
Characteristics of Gases
-no shape, not in contact, no attraction, constant motion through container, high kinetic energy
Physical Property
A measurable or visible property of an object
Chemical Property
A property of an object that allows the chemical composition or identity to be changed
Heterogeneous Mixture
A mixture that doesn't have a uniform composition
Homogeneous Mixture
A mixture that has a uniform composition
Solution
A uniform mixture that contains a solvent and at least one solute
Solute
The smaller part of the solution that gets dissolved into the solvent
Solvent
The larger part of the solution that dissolves the solute
Soluble
The ability of a pure substance to dissolve a solute
Element
one kind of atom (gold)
Pure Substance
One kind of particle(water)
Mixture
physically combined substances (sand)
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