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# BHS phy sci unit 1

### Ch 1 & 2

TermDefinition
induction Drawing general conclusions from many individual observations
science a way of learning about the natural world that is based on evidence and logic
scientific law a statement describing what always happens under certain conditions in nature
scientific theory a broad explanation that is widely accepted because it is supported by a great deal of evidence
chemistry Study of the structure, properties, and interactions of matter, usually at a small scale such as atoms and molecules.
physical science Study of matter and energy.
physics Study of energy and how it interacts with matter.
control Variable in an experiment that is held constant so it will not influence the outcome.
ethics Rules for deciding between right and wrong.
experiment Controlled scientific study of a limited number of variables.
field study Investigation of a problem in a real-world setting.
hypothesis Potential answer to a question that can be tested by gathering information.
manipulated variable Factor that is changed, or manipulated, by a researcher in a scientific experiment; also called independent variable.
observation Any information that is gathered with the senses.
replication getting the same results when an investigation is repeated
responding variable factor in an experiment that is expected to change, or respond, when the manipulated variable changes; also called the dependent variable
accuracy Closeness of a measurement to the true value.
Kelvin scale SI scale for measuring temperature in which the freezing point of water is 273 K and the boiling point of water is 373 K.
mean Average value of a set of measurements that is calculated by summing the individual measurements and then dividing the total by the number of measurements.
model Representation of an object, system, or process.
precision Exactness of a measurement.
range total spread of values in a set of measurements that is calculated by subtracting the smallest value from the largest value
scientific notation Way of writing very large or very small numbers that uses exponents in the format a \times 10^b.
SI International System of Units, which is used by most scientists.
significant figures Correct number of digits in an answer that is based on the least precise measurement used in the calculation.
engineer Professional in technology.
technological design Development of new technology.
technology Application of knowledge to real-world problems.
Created by: ballen1209