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theory
- the best explanation currently accepted for a specific event
- Ex: evolution is a theory, the big bang is a theory
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continental drift
theory that the Earth's land masses have slowly changed location on the surface of the Earth
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spontaneous generation
this disproves the theory that living organisms developed from non-living matter
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bias
thinking that prevents an open minded judgement of something
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solid
one of the four states of matter that refers to a substances that has a definite shape and volume
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liquid
one of four states of matter that refers to a substance that has a definite volume, but takes the shape of a container
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gas
one of four phases/states of matter that refers to a substance that takes both the shape and volume of the container
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plasma
one of the four states of matter that does not have a definite shape or volume and whose particles have broken apart. It is composed of electrons and positiviely-charged electrons. Fire is an example
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boiling point
the temperature at which a liquid heats up to change into water vapor
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melting point
the temperature at which a solid changes into a liquid
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physical change
changes in matter, observed or measured without changing the substance
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volume
how much space an object occupies
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Conservation of Mass
a science law that states during a chemical reaction, matter cannot be created or destroyed
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atom
smallest whole particle of an element
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atom
smallest whole particle of an element
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proton
positively charged particle in the nucleus of an atom
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neutron
neutral particle in the nucleus of an atom
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nucleus
central core onf an atom, contains protrons and neutrons
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electron
negatively charged particle of an atom orbiting the nucleus
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element
one of the pure substances that all matter is made of, a few more than 100 of these
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chemical property
a substance's ablility to react with other substances to create a different substance
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