physical chemistry

Bias

Occurs when what the scientist expects changes how the results are viewed.

Volume

The amount of space occupied by an object.

Independent Variable

Factor being tested or manipulated in an experiment.

Dependent Variable

Factor that is being measured in an experiment.

Experiment

Organized procedure for testing a hypothesis; tests the effect of one thing on another under controlled conditions.

Technology

Application of science to help people.

Density

The mass per unit volume of a material.

Scientific Method

Organized set of investigation procedures.

Standard

An exact quantity that people agree to use to compare measurements.

Constant

Factors in an experiment that are the same in the control group and experimental group.

Control

Standard used for comparison of test results in an experiment.

SI International System of Units

The world-wide accepted version of the metric system that is based on multiples of ten and includes the meter, liter, an kilogram.

model

Can be used to represent an idea, object, or event that is too big, too small, too complex, or too dangerous to observe or test directly.

Mass

Amount of matter in an object.

Hypothesis

Educated guess using what you know and what you observe.

Graph

Visual display of information or data that can provide a quick way to communicate a lot of information and allow scientists to observe patterns.

Theory

Explanation of things or events that is based on knowledge gained from many observations and investigations.

Scientific Law

Statement about what happens in nature that seems to be true all the time. Does not explain why or how something happens.