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science
Term | Definition |
---|---|
Matter | Anything that has mass and takes up space. |
Physical changes | Any change that alters form or appearance of matter but, DOES NOT CHANGE! any substance in the matter to a difference. Changing substance but, NOT WHAT IT IS! |
Chemical changes | A change in matter that produces one or more NEW substances. |
Weight | Gravity pulls on an object, DOES change! |
Mass | Matter in an object, does NOT change! |
Volume | length * width * height. The amount of space occupied. |
Qualitative Observations | Made by gathering information that can be recorded using DESCRIPTIVE LANGUAGE! |
Quantitative Observations | Made by gathering information that can be recorded with a MEASUREMENT UNIT! |
Inference | NOT A FACT, but an INTERPRETATION of what the direct observations mean. |
Scientific Law | Describes what scientist EXPECT to happen every time under a particular condition. |
Constant | Part of an experiment that is HELD IN THE SAME CONDITION for control and experimental |
Variable | Part of the experiment that CHANGES! |
Independent Variable (manipulated variable) | 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 |
Inquire | To ask for information |
Dependent Variable (responding variable) | A resulting factor in a controlled experiment that is observed and MEASURED TO SEE IF IT CHANGES DUE TO 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. |
Mixture | matter that consists of two or more substances not chemically combined |
Element | the simplest type of pure substance |
Compound | two or more elements chemically combined |
Pure Substances | a substance made of only one kind of material having definite proportional amounts and properties |
Homogeneous Mixture | two or more substances not chemically combined, but appearing to be evenly blended |
Heterogeneous Mixture | two or more substances not chemically combined, and appearing non-uniform with physically distinct substances included |