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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) |