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40 Cards in this Set
- Front
- Back
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Science
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a system of knowledge based on facts or principles
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technology
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the application of science to meet human needs
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scientific theory
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a tested, possible explanation of a natural event
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scientific law
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a summary of an observed natural event
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critical thinking
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applying logic and reason to observations and conclusions
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scientific method
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a series of logical steps to follow in order to solve problems
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variable
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anything that can change in an experiment
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length
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the straight-line distance between any two points
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mass
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a measure of the quantity of matter in an object
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volume
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a measure of space, such as the capacity of a container
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weight
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the force with which gravity pulls on a quantity of matter
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scientific notation
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a value written as a simple number multiplied by a power of 10
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precision
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the degree of exactness of a measurement
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significant figures
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the digits in a measurement that are known with certainty
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accuracy
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the extent to which a measurement approaches the true value
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matter
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anything that has mass and occupies space
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chemistry
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the study of matter and how it changes
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element
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a substance that cannot be broken down into simpler substances
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atom
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the smallest particle that has the properties of an element
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compound
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a substance made of atoms of more than one element bound together
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molecule
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the smallest unit of a substance that exhibits all of the properties characteristic of that substance
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chemical formula
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the chemical symbols and numbers indicating the atoms contained in the basic unit of a substance
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pure substance
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any matter that has a fixed compostion and definite properties
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mixture
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a combination of more than one pure substance
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miscible
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describes two or more liquids that are able to dissolve into each other in various proportions
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immiscible
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describes two or more liquids that do not mix into each other
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viscosity
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the resistance of a fluid to flow
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energy
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the ability to change or more matter
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evaporation
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the change of a substance from a liquid to a gas
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condensation
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the change of a substance from a gas to a liquid
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sublimation
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the change of a substance from a solid to a gas
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chemical property
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the way a substance reacts with others to form new substances with different properties
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reactivity
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the ability of a substance to combine chemically with another substance
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physical properties
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a characteristic of a substance that can be observed or measured without changing the composition of the substance
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melting point
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the temperature at which a solid becomes a liquid
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boiling point
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the temperature at which a liquid becomes a gas below the surface
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density
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the mass per unit volume of a substance
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buoyancy
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the force with which a more dense fluid pushes a less dense substance upward
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chemical change
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a change that occurs when a substance changes composition by forming one or more new substances
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physical change
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a change in the physical form or properties of a substance that occurs without a change in composition
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