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8th Physical Sci

8th physical sci

TermDefinition
Mass A measure of how much is in an object
Matter Anything that has mass or takes up space
Weight A measure of force or gravity on an object
Physical Properties A characteristic of a pure substance that can be observed with out changing it into another substance
Chemical Properties A characteristic of a pure substance that describes its ability to change
Qualitative observations made by gathering information that can be recorded using descriptive language
Quantitative observations 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 observations mean
scientific law Describes what scientist 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 experimental
variable part of the experiment that changes
independent variable a factor in a controlled experiment that is intentionally changed by the experimenter
theory well tested explanation for a wide range of observations or experimental results
inquiry to ask information
responding 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 to which all other levels are compared in a scientific experiment
Work is a force exerted on an object that causes it to move
force a push or pull exerted on an object
newton a unit of force required to move 1 kilogram 1 meter squared
mechanical advantage the ratio of the output force produced by a machine to the applied input force.
newton's first law an object in rest stays in rest or an object that is moving at a speed in a straight lines keeps moving at that speed unless another force acts on it
newton's second law the amount of force needed to make an object change its speed depends on the mass of the object and the acceleration required
newtons third law for every action there is an equal and opposite action
gravity force that pulls objects toward each other.
Created by: hope827
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