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8th Physical Sci

TermDefinition
Qualitative Observation Made by gathering information that can be recorded using descriptive language
Quantitative Observation Made by gathering information that can be recorded as a number with a measurement unit
Inference Not a fact, but an interpretation of what the direct observation means
Scientific Law Describes what scientists expect to happen every times under a particular set of conditions
Constant Part of an experiment that is held in the same condition for control and experimental
Variable Part of the experiment that changes
Manipulated Variable A factor in a controlled experiment that is intentionally changed by the experimentor
Theory a well tested explanation for a wide range of observations or experimental results
Question To ask for information
Responding Variable A resulting factor
Experiment A course of action completed in order to test a hypothesis
Control A standard to which all other levels are compared in a scientific experiment
Matter Has mass takes up space
Physical Properties A characteristic of a pure substance that can be observed without changing it into another substance
Chemical Properties A characteristic of a pure substance that describes its ability to change into a different substance
Work Force exerted on an object that causes it to move
Force A push or pull exerted on an object
Gravity Force that pulls object towards each other
Newton A unit of force required to move 1 kilogram 1 meter squared
Newton's Law 1 An object at rest stays at rest or an object that is moving at a velocity in a in a straight line keeps moving at that velocity unless another object acts on it
Newton's Law 2 The amount of force needed to make an object change its speed depends on the mass of the object and the acceleration required
Newtons"s Law 3 For every action(or force), there is an equal and opposite action(or force)
Mechanical Advantage The ratio of the output force produced by a machine to the applied input force
Accuracy The extent to which a given measurement agrees with the standard value for that measurement.
Calibration
Graduated Cylinder A narrow, cylindrical container marked with horizontal lines to represent units of measurement and used to precisely measure the volume of liquids
International System of Measurement
Liquid Composed of molecules that move freely among themselves but do not tend to separate like those of gases; neither gaseous nor solid
Matter The substance or substances of which any physical object consists or is composed
Mass A body of coherent matter, usually of indefinite shape and often of considerable size
Meniscus The convex or concave upper surface of a column of liquid, the curvature of which is caused by surface tension
Newton A unit of measurement
Percision The state or quality of being precise
Triple Beam Balance It has a beam which is supported by a fulcrum. On one side is a pan on which the object is placed. On the other side, the beam is split into three parallel beams , each supporting one weight.
Unit Any group of things or persons regarded as an entity
Volume Is the quantity of three-dimensional space enclosed by some closed boundary, for example, the space that a substance (solid, liquid, gas, or plasma) or shape occupies or contains
Weight The force that gravitation exerts upon a body, equal to the mass of the body times the local acceleration of gravity: commonly taken, in a region of constant gravitational acceleration, as a measure of mass.
Pure Substance A substance made of only one kind of material having definite shape proportional amounts and properties
Mixture Matter that consist of two or more substances not chemically combined
Element The simplest type of pure substance
Compound Two or more elements chemically combined
Homogeneous Mixture Two or more substances not chemically combined, but appearing to be evenly blended
Heterogeneous Mixture Two or more substances not chemically combined, and appear non- uniform with physical
Created by: xoxo_marissa41