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8th physical science
| Term | Definition |
|---|---|
| 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 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 conditons |
| Constant | Part of an experiment that is held in the same condition for control and experimental |
| Variable | Part of an experiment that changes |
| Manipulated Variable | A factor in a controlled experiment that is intentionally changed by the experimentor |
| Theory | A well tested explanation for a wide range of observations or experimental results |
| Inquiry | To ask for information |
| Responding variable | A resulting factor in an 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 |
| Matter | Anything that has mass and takes up space |
| Physical properties | A characteristic of a pure substance that can be observed without changing it into another substance |
| Chemical properties | A characteristic of a pure substance that describes its ability to change into different substances |
| Atoms | The basic particle from which all elements are made |
| Weight | A measure of the force of gravity on you |
| Mass | The measurement of the amount of matter in an object |
| Volume | Length x Width x Height |
| Mechanical advantage | The ratio of the output force produced by a machine to the applied force |
| Newtons | A unit of force required to move 1 kilogram 1 meter squared |
| Work | Force exerted on an object on an object that causes it to move |
| Force | a push or pull exerted on an object |
| Gravity | The force that pulls objects towards each other |
| Newton's law 1 | An object at rest stays at rest or an object that is moving at a velocity in a straight line keeps moving at that velocity unless another object acts on it |
| Newton's law 2 | The amount of force needed to make an object change its speed depends on the mass of an object and the acceleration required |
| Newton's law 3 | For every action (or force), there is an equal and opposite action (or force) |
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