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8 physical science

8 grade science

TermDefinition
qulatative made by gathering information that can be recored using descriptive
quanative made by gathering infomation that can be recored as a number with a measurement unit
inference not a fact but an interpretation of what the direct observations
law descrides 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 contorl and experimental
variable part of the expermient that changes
mainlipalted variable a factor ina controlled experiment that is intentionally changed by the experimenter
theory a well tested explanation for a wide range of observations or experimenttal reults
inqury to ask for imfomation
responding variable a resulting factor in a contorlled 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
contorl a standard to which all other levels are compared in a scientific experiment
matter anything that has mass and volume
physical change dont change substance anly form
chemical change a change in matter that produces one or more new substances
newton si unit of force
work a body's relative mass or the quantity of matter contained by it, giving rise to a downward force; the heaviness of a person or thing.
force strength or energy as an attribute of physical action or movement.
machanical advatage the ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine.
gravity force pulling together all matter. The more matter, the more gravity, so things that have a lot of matter such as planets and moons and stars pull more strongly. Mass is how we measure the amount of matter in something.
1 law of motion Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.
2 law of motion he acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
3 law motion Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.
unit of mass The standard International System of Units (SI) unit of mass is the kilogram (kg). The kilogram is 1000 grams (g), which were first defined in 1795 as one cubic decimeter of water at the melting point of ice.
weight a body's relative mass or the quantity of matter contained by it, giving rise to a downward force; the heaviness of a person or thing.
Created by: jbspriggs