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9 Cards in this Set

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The way a substance reacts with others to form new substances with different properties.
What is chemical property?
elements having less or more reactivity
The ability of a substance to combine chemically with another substance.
What is reactivity?
example: flammability when in presence of oxygen
A characteristic of a substance that can be observed or measured without changing the composition of the substance
What is a physical property?
some can be observed like shape, color, odor, and texture with the senses while others can be measured (ex. abiity to conduct heat, magnetism, or electricity)
The temperature at which a solid becomes a liquid.
What is the melting point?
It is constant in a pure substance regardless of mass or volume
The temperature at which a liquid becomes a gas below the surface.
What is the boiling point?
true for all pure substances regardless of mass or volume
The mass per unit volume of a substance.
What is density?
light vs. heavy; float vs. sink
The force with which a more dense fluid pushes a less dense substance upward.
What is buoyancy?
ice floating on water; cream rising to the top of milk
A change that occurs when a substance changes composition by forming one or more new substances.
What is a chemical change?
changes such as burning gasoline in an engine to release energy
A change in the physical form or properties of a substance that occurs without a change in composition.
What is a physical change?
does not affect all properties due to not changing composition