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# Unit 1

### Science, Technology, and Engineering

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
Empirical evidence the observations, measurements, and other types of data that people gather and test to support and evaluate scientific explanations
Experiment an organized procedure to study something under controlled conditions
Observation the process of obtaining information by using the senses
Hypothesis a testable idea or explanation that leads to scientific investigation
Prediction a statement about what will happen under certain conditions
Independent variable in a scientific investigation, the factor that is deliberately manipulated
Dependent variable in a scientific investigation, the factor that changes as a result of manipulation of one or more independent variables
Constant a condition or factor that is assumed to have one value, or remain unchanged, throughout a particular investigation
Data information gathered by observation or experimentation that can be used in calculating or reasoning
Repetition the conduction of an investigation multiple times
Replication to conduction of an investigation by multiple scientists
Experimental error errors in measurement due to imprecise tools or by rounding during calculations
Peer review process where other scientists evaluate the methods used in a study and the conclusions reached by the original scientist
Measurement a quantitative description of something that includes a number and a unit, such as 42 meters
SI units standard units used by scientists worldwide (usually based on factors of 10)
Derived units units that are calculated from other base units
Scientific notation a method of expressing a quantity as a number multiplied by 10 to the appropriate power
Accuracy a description of how close a measurement is to the true value of the quantity measured
Precision how close two or more measurements are to each other
Mean the number obtained by adding up the data for a given characteristic and dividing this sum by the number of individuals
Model a pattern, plan, representation, or description designed to show the structure or workings of an object, system, or concept
Simulation a method that is used to study and analyze the characteristics of an actual or theoretical system
Engineering the application of science and mathematics to solve real-life problems
Technology the application of science for practical purposes; the use of tools, machines, materials, and processes to meet human needs
Prototype a test model of a product
Created by: CSchveder74

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