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# Physical Ch.1

### Physical Science Ch.1 Introduction to Science

TermDefinition
Science The knowledge obtained by observing natural events and conditions in order to discover facts and formulate laws or principles that can be verified or tested
Technology Is the application of science for practical uses
Law A descriptive statement or equation that reliably predicts events under certain conditions.
Theory a system of ideas that explains many related observations and is supported by a large body of evidence acquired through scientific investigation.
Critical Thinking the ability and willingness to assess claims critically and to make judgements on the basis of objective and supported reasons.
Scientific Method A series of steps followed to solve problems including collecting data, formulating hypothesis, testing the hypothesis, and stating conclusions.
Variable A factor that changes in an experiment in order to test a hypothesis.
Bias a way of thinking that favors one outcome or interpretation
Length Measure of the straight line distance between two points. SI unit=Meter(M)
Mass Measure of the amount of matter in an object. Si unit= Kilogram (kg)
Volume A measure of the size of body or region in three dimensional space. SI unit= cubic meter (m3)
Weight A measure of gravitational force exerted on an object.
Scientific Notation A method of expressing a quantity as a number multiplied by 10 to the appropriate power
Precision The exactness of a measurement
Significant figure A prescribed decimal place that determines the amount of rounding off to be done based on the precision of the measurement.
accuracy A description of how close a measurement is to the true value of the quantity measured
Dependent Variable Is the value measured. It depends on what happens in the experiment and the independent variable.
Independent Variable The variable the is manipulated or controlled.
Bar graph When you want to compare similar data for several individual items or events.
Line Graph Good for displaying data that changes continously
Pie Graph For displaying data of parts of a whole
Created by: osubuckeye1012