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8th Physical Sci
| 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. |
| theory | a well tested explanation for a wide range of observations or experimental results. |
| inquiry | to ask for information |
| dependent variable | a resulting factor in a 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. |
| matter | anything that has mass and takes up space. |
| physical properties | a characteristic of a pure substance that can be observed without changing it to another substance. |
| chemical properties | a characteristic of a pure substance that describes its ability to changes into different substances. |
| elements | the simplest substances. |
| atoms | the basic particle from which all elements are made. |
| weight | a measure of the force of gravity on an object. |
| mass | the measurement of the amount of matter in the object. |
| units of mass | grams |
| volume | the amount of space the matter occupies. |
| force | a push or pull exerted on an object. |
| work | force exerted on an object that cause it to move. |
| gravity | the force that pulls objects towards each other. |
| newton | a unit of force required to move 1 kilogram 1 mass squared. |
| Newton's First Law | an object at rest stay at rest. An object in motion stays at motion unless another force acts on it. |
| Newton's Second Law | The more mass you have, the more force is needed. |
| Newton's Third Law | For every action (or force), there is an equal and opposite action (or force.) |
| Mechanical Advantage | the ratio of the output force produced by a machine to the applied input force. |
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Kaylynpena
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