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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 experimental |
Scientific Theory | a well tested explanation for a wide range of observations or experiment results |
Inquiry | to ask for information |
Dependent Variable and Responding Variable | a resulting factor in a controlled experiment that is observed and measure to see if it changes due to the manipulation of another varibale |
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 |
Physical Properties | does not make change ex.ice melting, cutting paper |
Chemical Properties | produces one or more substances |
Mechanical Advantage | The ratio of the output force produced by a machine to the applied force |
Work | force exerted on an object that causes it to move |
Force | a push or pull exerted on an object |
Gravity | the force that pulls two objects towards each other |
Newton | A unit of force required to move 1 kilogram 1 meter required |
Newton's First Law | An object at rest stays at rest or an object that is moving in a straight line keeps moving at that velocity unless another force acts on it |
Newton's Second Law | The amount of force needed to make an object change its speed depends on the mass of the object and the acceleration required |
Newton's Third Law | For every action (or force), there is an equal or opposite action ( or force) |