Chemistry - ANS Science that describes matter - its properties,
the changes it undergoes, and the energy changes that accompany those processes
Matter - ANS anything that takes up space and has volume
energy - ANS the ability to do work
Types of Energy - ANS mechanical, heat, mechanical
Substance - ANS form of matter; all samples have identical compositions
Mixture - ANS combination of two or more substances in which the substances retain their
individual identities
Homogenous mixture - ANS have uniform compositions and properties throughout
-air -water
Do not form uniform compositions - ANS Heterogeneous -sand and water
Compounds - ANS a substance that can be decomposed into simpler substances through
chemical change; a substance composed of multiple atoms chemically united in fixed
proportions
Extensive Property - ANS DO depend how much matter is used
Difference between heat and temperature - ANS Heat is a form of energy
Temperature is the intensity of heat in an object
Intensive Property - ANS Do NOT depend on how much matter is present
Mars Climate Orbiter - ANS Lost in 1999 because of the mix ups in unit of measurements
Democritus - ANS first to propose that matter is composed of "atomos"
The Law of Definite Proportions (Proust) - ANS all samples of a given compound, regardless of
their source or how they were prepared, have the same proportions of their constituent
elements
The Law of Multiple Proportions (Dalton) - ANS number of elements when combined are in
whole numbers
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