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CSA 1 Study Guide

TermDefinition
nucleus center of the atom; includes neutrons (no charge), and protons (positive charge)
Electron cloud surrounds the nucleus and includes the electrons
Mass the amount of matter in an object
Density an object's mass divided by its volume; a measure of how many particles are packed together into a certain amount of space (related word: dense) think about thickness
Physical Changes occur when materials are mixed and do NOT combine chemically; easily reversed; state changes
Examples of Physical Changes water and ice, oil and vinegar, salt and pepper, sugar and water, milk and corn flakes
Chemical Changes produces a new substance when two materials or more combine chemically; CANNOT be easily reversed
Examples of Chemical Changes vinegar and baking soda, lemon juice and baking soda
Solution a mixture in which a solid and a liquid or two liquids are mixed so evenly, that it is not possible to see the separate particles
Solute a substance that has the ability to be dissolved by a solvent to create a solution
Solvent a substance that has the ability to dissolve a solute when forming a solution
Solubility the amount of a substance (solute) that will dissolve in another substance (solvent) at a certain volume and temperature
Law of Conservation of Mass In a closed system, a physical process such as applying heat may change the form of a substance. However, the mass of the system is conserved.
Temperature how much energy the particles in matter have.
State of Matter depends on temperature/energy
Freezing change of state from liquid to solid
Boiling liquid heated to the point gas bubbles are forming
Melting change of state from solid to liquid
Evaporating change of state from liquid to gas
Condensation change of state from gas to liquid
Created by: ledee.workman
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