A hypothesis is a prediction of the outcome of a test. It forms the basis for designing an experiment in the scientific method. A good hypothesis is testable, meaning it makes a prediction you can check with observation or testing. Here are different hypothesis examples. Null Hypothesis Examples The null […]

Hypothesis Examples

Scientific Method Steps 3
The scientific method is a system scientists and other people use to ask and answer questions about the natural world. In a nutshell, the scientific method works by making observations, asking a question or identifying a problem, and then designing and analyzing an experiment to test a prediction of what […]

Steps of the Scientific Method

Percent error is the percent difference between a measured and expected value. (image credit: Sherman Geronimo-Tan) 9
Percent Error Definition Percent error, sometimes referred to as percentage error, is an expression of the difference between a measured value and the known or accepted value. It is often used in science to report the difference between experimental values and expected values. The formula for calculating percent error is: […]

Calculate Percent Error

Lab Mice
Atherosclerosis is a medical condition where fatty materials, such as cholesterol, build up on the walls of blood vessels. Arteries begin to stiffen and narrow, reducing blood flow and increasing blood pressure. This the main cause of heart attacks and strokes and one of the leading causes of death in humans. Scientists at Johns Hopkins identified […]

New Method To Fight Cholesterol