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All matter can be classified as mixtures and ______.

Pure Substances

A substance made of 2 or more elements.

compound

A) Milk B) Copper C) Granite D) Chicken noodle soup Which one is a pure substance?

B) Copper

made of 2 or more elements, can not be separated by physical means and is classified as a pure substance.

Compounds

The quantity or the amount of matter present

mass

The process of changing from a gas to a liquid

condensation

The process of changing a liquid to a gas

vaporization

List the phases of water (in order), from slowest molecular motion to fastest

solid-liquid-gas

Vaporization that takes place at the surface of a liquid

evaporation

The temperature at which a solid changes to a liquid

Melting point

The boiling point of water

100ºC

The ability to be drawn into a wire

ductile

The physical property that describes how light reflects off a substance

luster

The “thickness” of a liquid or the resistance to flow in a liquid

Viscosity

The ability to be pounded into a sheet by metals

malleable

A solid formed by the reaction of 2 liquids

precipitate

The energy needed to start an exothermic reaction

Activation energy

A substance used that lowers the amount of activation energy needed to start an exothermic reaction

catalyst

The type of change indicated by a change in color

chemical

A reaction that requires energy to be put in to continue the reaction

Endothermic reaction

Burning, combustion and explosions are type of _____________ reactions.

exothermic

A substance has a volume of 3.0 cm 3 and a mass of 18 grams. What is its density?

6.0 g/cm 3

The graph show the energy change of an __________ reaction.

exothermic

A reaction with oxygen

oxidation

The substance being dissolved in a solution.

solute