In the first part of this lab, you will measure the absorption spectra of two conjugated dyes and compare the results to the theoretical predictions of a particle-in-a-box model. In the second part of the experiment, you will identify...

See sea urchins as they develop. A complete set of instructions for a lab in developmental biology. Excellent supporting material is provided, including troubleshooting information.

This set of exercises provides well written procedures and background for labs at basic and advanced levels.

This site is actually a lab from the University of Kentucky Electrical Engineering Department. It is an excellent experiment that can be done at the high school level.

Geared towards helping Dartmouth College students starting General Chemistry Laboratory, this site offers resources important for anyone in the lab. Learn why you should keep a lab notebook and how to keep yourself and others safe. This...

What are those big, silver containers that scientists push down the Magnet lab hallways? Find out what these devices are in this short article.

Beginner level resource for studying nanoscience and nanotechnology. Find an exhaustive collection of virtual labs are contained in the syllabus.

An interactive simulation that teaches about periodic motion, simple harmonic motion, and conservation of energy. Observe one or two pendulums to determine how the swing is influenced by the length of the string, the mass of the pendulum...

An interactive simulation that teaches about Beer's Law, solutions, concentration, spectrophotometry, and more through observations to explore how much light is absorbed and transmitted with changes in thickness and color. This...

Create the parameters of your own ecosystem by choosing which producers and consumers live there. Visualize how the food web operates and species populations change. This simulator mimics the food web within a typical ecosystem and gives...

This app will help students "learn about the science and techniques used to identify different types of bacteria based on their DNA sequences".

Five inquiry-based investigations designed for the observation of primates in a zoo setting. The labs ask guiding questions and list notable primate behaviors.

In this experiment, you will determine the rate law and confirm the mechanism of the reaction between cyclohexanone and iodine. Requires Java and QuickTime plug-ins to access some features.

A simple explanation of the structures theoretically found within protons and neutrons. The resource consists of pictures and links to additional resources.

This site describes and demonstrates a number of important concepts related to direct current circuits. Information on many of the featured topics, such as the use of Ohm's law and Kirchhoff's laws. Examples of featured topics include...

Using this tutorial, you'll learn how to solve absolute value equations. View step-by-step solutions and video explanations of example problems, and solve practice questions at the end.

This virtual laboratory demonstrates how an enzyme-linked immunosorbent assay (ELISA) is carried out and some of the key experimental problems that may be encountered. Students will learn about the assay procedure and the equipment and...

A huge database is accumulating that can be used by educators and scientists to examine the status of bird populations in locations of their choosing. It is becoming a goldmine of information about bird biodiversity around the globe. All...

These physics lessons and tutorials are designed to be a resource for learning introductory level, algebra-based physics. Organization is by topic, but a search option is available for quickly finding specific information. Although most...

Use this activity as an introduction to adaptations. Students will view video clips of birds and formulate their own observations and explanations for the different types of bird beaks and how they are used.

A simple explanation of neutron activation of some natural elements in order to create a radioactive nucleus.

Presented are various maps that show how American voters have cast their ballots in US presidential elections from 1928-1968.

For a quarter-century, the federal government provided funding for cities large and small to raze "blighted" or "slum" neighborhoods. Through these programs, cities displaced hundreds of thousands of families from their homes and...

A complete set of directions, notes, and suggestions for a lab involving the determination of the specific heat values for various metals. Suitable for a student project or lab investigation.