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8th physical science
| Term | Definition |
|---|---|
| qualitative observation | made by gathering information that can be recorded using 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 observations mean |
| 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 experimental |
| variable | part of the experiment that changes |
| manipulative | 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 |
| inquiry | to ask for information |
| dependent responding | a resulting factor in a controlled experiment that is observed and measured to see if it changes due to the manipulation of another varible |
| experiment | a course of action completed in order to test a hypothesis |
| controll | a standard to which all other levels are compared in a scientific experiment |
| matter | anything that has a mass and takes up space |
| physical properies | characteristics of a pure substance that can be observed with out changing into another |
| chemical properties | a characteristic of a pure substance that describes its ability to change into a different substance |
| elements | a pure substance that can not be broken down |
| atoms | basic particle from which all elements are made |
| weight | force of gravity |
| mass | amount of matter in the object |
| volume | the amount of space an object occupies |
| work | force exerted on an object that causes it to move forward |
| newton | a unit of force required to move 1 kilogram 1 meter squared |
| newton 1 | object at rest stays at rest or an object that is moving at speed in a straight line keeps moving at that speed unless another force acts on it |
| newton 2 | amount of force needed to make an object change its speed depends on the mass of the object and the excelation required. |
| newton 3 | for every action (force), there is an equal and opposite action (force). |
| force | a push or pull exerted on an object. |
| gravity | force that pulls object towards each other. |
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