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8 physical science
8 grade science
Term | Definition |
---|---|
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. |