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Physical Science: Unit 2 Vocab

Across
Phase change from liquid to gas
Type of matter made from two or more substances that are not chemically combined (Examples: Air, salt water)
_____ properties of a substance describe how it will react with others to create an entirely new substance (Examples: flammability, reactivity)
Type of mixture that is uniform and evenly mixed throughout
Type of mixture that is unevenly mixed and individual components can be seen
State of matter in which particles are closely packed and vibrate in place
_____ properties of a substance can be observed without changing the identity of the substance (Examples: Color, shape, mass)
The average amount of thermal energy from all particles in a substance
State of matter in which particles are loosely packed and can slide past each other
A process that requires thermal energy to be removed or released
Down
Type of matter made from atoms of more than one element that are chemically combined (Examples: CO2, NaCl)
Phase change from gas to solid
State of matter in which particles are very spaced out and move in all directions
State of matter in which particles have so much energy they have lost their electrons and become charged
Type of matter that contains atoms that are all alike. It cannot be separated into anything simpler. (Examples: O2, Fe, Ne)
Phase change from gas to liquid
Phase change from solid to gas
A process that requires thermal energy to be added or absorbed
How much matter is packed into a certain volume. Can be calculated by dividing mass by volume.