chapter 1 Flashcards
science
a system of knowledge about the natural world and the methods used to find that knowledge
technology
the use of scientific knowledge to solve practical problems
chemistry
the study of the composition, structure, properties, and reactions of matter
physics
the study of matter and energy and the interactions between them through forces and motion
scientific method
an organized plan used for gsrhering, organizing, and communicating information
observation
information obtained through the senses
hypothesis
a proposed answer to a question
manipulated variable
the variable that causes the change in another variable
responding variable
a variable that that changes in response to a change in the manipulated variable
controlled experiment
an experiment in which only one variable, the manipulated variable, is deliberately changed at a time
scientific theory
a well-tested explanation for a set of observations or experimental results
scientific law
a statement that summarizes a pattern in nature
model
a representation of an object or event
scientific notation
a way of expressing a value as the product of a number between 1-10 and to a power of 10
length
the straight line difference between two points
mass
the amount of matter in an object
volume
the amount of space taken up by an object
density
the ratio of a material’s mass to its volume
precision
a gauge of how exact a measurement is
significant figures
all the digits in a measurement that are directly measured, plus the last digit, which is estimated
accuracy
the closeness of a measurement to the true value of what is measured
thermometer
an instrument that measures temperature
slope
the steepness of a line equal to the ratio of a vertical change to the corresponding horizonatl chage
