Variables are factors or quantities that may be change or controlled in a scientific experiment. The three types of variables in a science project or experiment are independent, controlled and dependent variables. The in... More »

Ideally, an experiment should have an independent variable, a dependant variable, and a control variable. Researchers take steps to eliminate as many extraneous variable as possible, although eliminating all of them migh... More »

Controlled experiments have three types of variables: dependent, independent and controlled. Independent variables, also called manipulated variables, are altered during an experiment. The resulting measurable change is ... More »

A control experiment is a type of scientific experiment that is carried out alongside the test experiment, with all variables held constant except for one variable which is under consideration. A good example of a contro... More » Science Chemistry Chem Lab

In experimental research, researchers use controllable variables to see if manipulation of these variables has an effect on the experiment's outcome. Additionally, subjects of the experimental research are randomly assig... More »

In chemistry, a physical change occurs when matter is altered without modifying its basic molecular composition. Some examples of physical changes include boiling or freezing of water, chopping up wood, melting of gold o... More »

How long a candle burns depends on several variables, including the type of wax used, the type of wick, the presence of additives and the candle's size. Typically, smaller candles with smaller wicks can be expected to bu... More » Science Chemistry Chem Lab