When DNA research first began, it required almost an entire day to extract the molecules from a cell nucleus. Now it requires less than an hour. Scholars learn about the early theories of DNA with an online interactive, videos,...

What happens to radio waves, time, and light in and near a black hole? Young scientists explore what is known about observing frequency and time at various distances from a black hole. They control the size of the black hole and the...

How is a molecule's shape determined? Explore bond angles, lone pairs, and VSEPR theory through a logic-based activity. Chemists pull together information about the major molecular shapes, then use it to solve puzzles.

Scholars take off on an interactive spaceship to explore a historical timeline of the big bang theory. They learn about the evolution of mammals and humans, the formation of stars and planets, and the chemical composition of the early...

Some genes link to others that have implications for inheritance. A set of resources lead pupils through the history of this discovery. They explain how chromosomes recombine and which parts are more susceptible to this linkage....

The breakthrough of Mendelian genetics solved many puzzles for biologists. Then, scientists decided to apply the theory to human behavior. Learn the story and struggle of finding a genetic explanation for hobbies, interests, and mental...

In this magnetism worksheet, students answer ten questions about magnets, their magnetic poles, the magnetic lines of flux and how magnets work.

For this static electricity worksheet, students complete nine questions about electron charges, coulombs, potential energy, voltage and the Van de Graaf generator.

Become a game show contestant in this online activity from A Science Odyssey and ask a series of questions to a panel of mystery scientists, using the answers to determine which scientist is Einstein.

A representation of Minkowski spacetime diagrams using graph paper that is rotated, showing the world lines of three stationary observers with light clocks.

The path of cannonballs fired near a black hole are computed using the Schwarzschild metric and presented in this visualization, allowing for study of the theory of general relativity. The cannon's angle and the number and speed of the...

Manipulate variables in order to observe the effects of relative motion on events such as an explosion and the time at which its light signal reaches a destination.

Graphical visualization of how the relative motion of two events affects their spatial and temporal separation in special relativity.

Simulation examining simultaneity and causality in special relativity by manipulating the space and time coordinates of one or two events.

This site offers a wealth of online textbook-related materials that encourage the discovery of science in the world around us. Enter the site to access material on specific topics. Each section contains reading material (complete with...

Visualization of how space curves near a huge object.

Take a look at general relativity with this science simulation illustrating orbits of objects that are the result of an explosion near a black hole measured in Schwarzschild metric. Users are able to adjust the energy from the exploding...

Consider general relativity with this simulation using Kerr metric of orbits in an equatorial plane near a rotating black hole.

A model for examining the simultaneity of two events where the relative velocity and the wave source, either light or sound, can be manipulated.

Using the Kerr metric this simulation illustrates the directions of light emitted from an equatorial plane near a rotating black hole.

Using Kerr metric this simulation illustrates the path of light emitted from the equatorial plane near a rotating black hole.

When an explosion occurs in the equatorial plane of a revolving black hole objects are released. This simulation illustrates the orbits of those objects in Kerr metric.

Using the Schwarzchild metric this simulates the path of light from a black hole also identifying specific time and angle of the light.

A simulation of a well-known special relativity experiment of Einstein's, involving a train and a tunnel. Velocity and tunnel length can be altered to observe the effects.