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8th Physical Science
Term | Definition |
---|---|
qualitative observation | made by gathering information that can be recorded usuing] 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 time under a particular set of conditions |
constant | part of an experiment that is held in the same condition for control and experiment |
variable | part of the experiment that changes |
manipulated variable | a factor in a controlled experiment that is intentionally changed by the experimenter |
scientific theory | a well tested explanation for a wide range of observations or experimental results |
question/inquiry | to ask for information |
responding variable | a resulting factor in a controlled experiment that is observed and measured to see if it changes due to the manipulation of another variable |
experiment | a course of action completed in order to test a hypothesis |
control | a standard in which all other levels are compared in a scientific experiment |
Newton or N | a unit of force required to move 1 kilogram 1 meter squared |
work | force exerted on an object that causes it to moce |
gravity | force that pulls objects towards each other |
force | a push or pull exerted on an object |
Newton's Law one | an object at rest stays at rest or an object that is moving at a velocity in a straight kine keeps moving at the velocity unless anther force acts on it |
Newton's Law two | the amount of force needed to make an object change its speed depends on the mass of the object and the acceleration required |
Newton's Law three | for every action/force, there is an equal and opposite action/force |
mechanical advantage | the ratio of the output force produced by a machine to the applied inputforce |