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Physical Science Chapter 1

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chemicalchange The application of science for practical purposes.
reactivity A property of matter that describes a substance’s ability to participate in chemical reactions.
mixture The capacity of a substance to combine chemically with another substance
criticalthinking A factor that changes in an experiment in order to test a hypothesis.
molecule The temperature and pressure at which a solid becomes a liquid.
flammability A substance made up of atoms of two or more different elements joined by chemical bonds.
scienctificnotation A change of matter from one form to another without a change in chemical properties.
puresubstance The smallest unit of a substance that keeps all of the physical and chemical properties of that substance.
weight A prescribed decimal place that determines the amount of rounding off to be done based on the precision of the measurement.
technology The ratio of the mass of a substance to the volume of the substance.
meltingpoint Describes two or more liquids that can dissolve into each other in various proportions.
mass A summary of many experimental results and observations; tells how things work.
accuracy Anything that has mass and takes up space.
scientifictheory The ability and willingness to assess claims critically and to make judgments on the basis of objective and supported reasons.
physicalproperty The smallest unit of an element that maintains the properties of that element.
boilingpoint An explanation of some phenomenon that is based on observations, experimentation, and reasoning.
precision A series of steps followed to solve problems, including collecting data, formulating a hypothesis, testing the hypothesis, and stating conclusions.
science ___is observing, studying, and experimenting to find the nature of things.
element A change that occurs when a substance changes composition by forming one or more new substances.
volume The ability of a substance to react in the presence of oxygen and burn when exposed to a flame.
heterogeneous A sample of matter, either a single element or a single compound, that has definite chemical and physical properties.
miscible A measure of the amount of matter in an object.
scientificlaw A combination of chemical symbols and numbers to represent a substance.
chemicalformula The exactness of a measurement.
chemicalproperty A measure of the gravitational force exerted on an object.
physicalchange To reduce the number of zeros, you can express values as a simple number multiplied by a power of 10.
density Composed of dissimilar components.
matter A description of how close a measurement is to the true value of the quantity measured.
variable Describes something that has a uniform structure or composition throughout.
significantfigure A measure of the size of a body or region in three-dimensional space.
homogeneous A measure of the straight-line distance between two points.
atom The temperature at which a liquid becomes a gas.
length A substance that cannot be separated or broken down into simpler substances by chemical means; all atoms of an element have the same atomic number.
scientificmethod A combination of two or more substances that are not chemically combined.
compound A characteristic of a substance that does not involve a chemical change, such as density, color, or hardness.

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