This site contains 5,161 images of the Hale-Bopp comet from 1995 to 2000. This incredible photo archive is definitely worth a visit.

A simulation of the Rutherford experiment. Includes an animation and an explanation of the history behind the experiment.

Young scholars discover that ionic bonding occurs when electrons are transferred from one atom to the other and not shared as in covalent bonding.

Young scholars interpret the information given in the periodic table to describe the arrangement of electrons on the energy levels around an atom.

Site highlights the various features of an animal cell. Presents users with a colorful diagram depicting the anatomy of the animal cell. Provides links to obtain more detailed information about the various components found in animal cells.

Self-guided learning activity where students learn about cell structure and function, different types of tissues, and various kinds of membranes in the body. There is a short quiz at the end of the lesson to check for understanding.

Use this site for lots of different ideas on how to make a model of a neuron.

36-page tutorial takes a look at the organization of living cells.

Description of organelles. Links will take you to a glossary with pictures for many of the definitions. Ends with a quiz linked to answers.

Discover how mitochondrial DNA (mtDNA) is inherited, and complete a pedigree chart by determining which individuals might share mtDNA with an unknown ancestor.

A wonderful PBS biography of a great man. This contains many personal touches, yet does a fine job of describing Bohr's scientific work. But it's best at Bohr the man. Nice quotes, one in the middle, one at the end.

This collection of publications about genetics includes a unique approach to illustrate a genetics timeline. Important genetic events are correlated with other historical events. The book format allows you to scroll through history.

A detailed look at comets. Content outlines our observational history, as well as the origins of comets and an explanation of the appearance of comets.

[Free Registration/Login may be required to access all resource tools.] All cells are one of two types, prokaryotic or eukaryotic. Students will learn the structural differences between the two cells, be able to give examples, and...

[Free Registration/Login may be required to access all resource tools.] Learn about the evolution of eukaryotes which is explained by the endosymbiotic theory.

Make learning about cells fun and easy with a collection of short video clips about cellular biology. Find out about the structure and function of the main organelles inside an animal cell.

Interactive concept simulation demonstrates the nuclear fusion of deuterium and tritium inside a tokamak reactor.

Given illustrations, diagrams, or descriptions, students will identify alpha, beta, or gamma radiation.

An interactive plant cell that presents labels and definitions of the different cell parts when selected.

Click on the left navigation terms for some great information about the 6th element in the periodic table, "carbon." Content focuses on carbon's electrons, where you can find carbon in nature and in the home, and how carbon combines with...

Here you can find some great information about the 7th element in the periodic table, "nitrogen." Content focuses on nitrogen's electrons, where you can find nitrogen in nature and in the home, and how nitrogen combines with other elements.

Here you can find some great information about the 9th element in the periodic table, "fluorine." Content focuses on fluorine's electrons, where you can find fluorine in nature and in the home, and how fluorine combines with other elements.

Here you can find some great information about the 10th element in the periodic table, "neon." Content focuses on neon's electrons, where you can find neon in nature and in the home, and how neon combines with other elements.

Here you can find some great information about the 12th element in the periodic table, "magnesium." Content focuses on magnesium's electrons, where you can find magnesium in nature and in the home, and how magnesium combines with other...