Use the table of contents to explore this site which recounts the plight of the Native Americans who lived in California before the Gold Rush and the impact of the gold rush on their lives.

In this activity, students examine how different balls react when colliding with different surfaces. Also, they will have plenty of opportunity to learn how to calculate momentum and understand the principle of conservation of momentum.

Material to begin an exploration of volcanoes, earthquakes, and plate tectonics. An hour-long video is accompanied by learning goals, an outline and overview, details on volcano types, plate boundaries, and "hot spots," and ideas for...

This site takes a long look at the manatee, including this animal's unique characteristics, habit and range. Special emphasis is placed on how and why the Florida manatee is an endangered species, and what kind of conservation efforts...

NASA has made predictions that by 2036 a quarter-mile-wide asteroid named Apophis could possibly collide with Earth. This site outlines what preventative measures scientists are taking to avoid this impact.

This page has pictures and descriptions of different areas on Earth where the plates are spreading. Also includes links to more information on slow, medium, and fast moving plates.

Visit this site to learn more about the different types of plate boundaries. Includes color pictures and easy-to-understand examples of how and why plates move the way they do.

This 5E model lesson helps students understand the concept of conservation of momentum.

In this experiment, students build and calibrate a rain gauge and use it to measure and record how much rain falls in their local area each time it rains.

This site, in German, offers numerous apps that illustrate common physics principles. Apps are organized into categories: mechanics, oscillations and waves, electrodynamics, optics, thermodynamics, the theory of relativity, physics of...

A detailed discussion of plate tectonics. Looks at continental drift, types of tectonic plates and plate boundaries, and primary and secondary tectonic plates.

This page provides a summary of each section in Chapter 10: Rotational Motion and Angular Momentum from the AP Physics online text.

Interactive site provides information on the Breakup of Pangea, plate boundaries, plate movements as well as a quiz.

Explore sports science and see how many points can you score with your bottle caps in Ruff's take on table hockey.

Use science inquiry to predict and investigate forces and motion to help rescue Ruff's plushie from the penguins' ice rink in this sports science game.

Learn about sports science and force and motion alongside Ruff Ruffman.

Can you break the bond between the two atoms?

National Public Radio provides highlights of both the top national and international news, as well as various editorials, commentaries, and reviews. The majority of the content is available in audio format.

This resource page discusses how close Earth is to a collision with other objects. This page gives helpful information about comets and asteroids as well links to other resources on the topic.

Sprains, fractures, contusions and abrasions are the most common types of injuries from riding a skateboard. Deaths due to collisions with cars and from falls also are reported. Several factors - lack of protective equipment, poor board...

Featured is an excerpt from the book, "Rivalry", by author John Taylor about "The Big Collision" between basketball rivals Wilt Chamberlain and Bill Russell in 1959.

Description of the Titanic with details on its collision with an iceberg in 1912 where almost 1500 people died.

In this activity, students investigate and discover how surface area, concentration, and temperature affect the rate of a chemical reaction. This lab is designed for students to practice good experimental tests of hypotheses, synthesize...

This tutorial helps students understand the Kinetic Theory, which explains the effects of temperature and pressure on matter as it goes through phase changes.