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science 8
Term | Definition |
---|---|
Qualitative | Made by gathering information that can be recorded using descriptive language. |
Quanitative | Made by gathering information that can be recorded as a number with a measurement unit. |
Law | Describes what scientist 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. |
independent variable | 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. |
Dependent Variable | A resulting factor in a 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. |
Inferance | Not a fact, but an interpretation of what the direct observations mean. |
Matter | Anything that has mass and takes up space. |
Physical Properties | Any changes that alters form or appearance of matter but does not make up any substance matter into a different substance. |
Chemical Properties | A change in matter that produces one or more new substance. |
Weight | Pull of gravity on an object. |
Mass | Matter in an object. |
Units of Mass | g for grams |
Accuracy | The extent to which a given measurement agrees with the standard value for that measurement. |
Calibration | To mark off lines on measuring equipment for the desired unit. |
Graduated Cylinder | Equipment used to measure liquid volume |
International System of Measurement | |
Liquid | Has a definite volume but no shape of its own. |
Mass | The mass of matter (atoms) in a substance; measured in grams and kilograms |
Matter | Anything that has mass and volume (takes up space). |
Meniscus | The curve on the upper surface of a liquid in a container caused by surface tension |
Newton-a unit of measurement | A unit of force required to move 1 kilogram 1 meter squared. |
Precision | The amount of detail or refinement in measurement. |
Triple Beam Balance | |
Unit | A single, undivided whole; a quantity chosen as a standard for measurement. |
Volume | Amount of space an object takes up. |
Weight | A measure of the force of gravity on an object. |
Matter | Anything that has mass and volume (takes up space). |
Pure Substance | A substance made of only one kind of material having a definite proportional amounts and properties. |
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. |
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 substance included. |