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the study of the composition, structure, properties, and reactions of matter


the study of matter and energy and the interactions between the two through forces and motion


the study of the origin, history, and structure of the earth


the study of the universe beyond earth, including the sun, moon, planets, and stars


the study of the origin of living things

scientific method

an organized plan for gathering, organizing, and communicating information


information that you obtain through your senses


a proposed answer to a question

manipulated variable

a variable that causes a change in another

responding variable

a variable that changes in response to the manipulated variable

controlled experiment

an experiment in which one variable, the manipulated variable, is deliberately changed at a time

scientific law

a statement that summarizes a pattern found in nature


representation of an object or event


the amount of space taken up by an object


the quantity of matter in an object or sample


the straight-line distance between two points


a gauge of how exact a measurement is

significant figures

all the digits that are known in a measurement plus the last digit that is estimated


the closeness of a measurement to the actual value of what is being measured


an instrument that measures temperature or how hot an object is


the ratio of a vertical change to the corresponding horizontal change

direct porportion

is a relationship in which the ratio of two variables is constant

inverse porportion

the product of two variables is constant


a substance that cannot be broken down into simpler substances


the smallest particle of an element


a substance that is made from two or more simpler substances and can be broken down into simpler substances

heterogeneous mixture

the parts of the mixture are noticeably different from one another

homogeneous mixture

the substances are so evenly distributed that is difficult to distinguish one substance in the mixture from another


when substances dissolve and form a homogeneous mixture


a heterogeneous mixture that seperates into layers over time


contains some particles that are intermediate in size between the small particles in a solution and the larger particles in a suspension


a process that seperates substances in a solution based on their boiling points


any solid that forms and seperates from a liquid mixture

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