Learn how atoms are the building blocks of all living and nonliving things.

Resource explains how during the time of the Civil War the Supreme Court used Article I, Section 10, Clause 1 of the U.S. Constitution to show that the Confederation formed by the seceding States had no legal existence. The site also...

A lesson plan in which students sort words based on the meanings of their affixes: before, one who, state or qualify of, and wrongly. Materials are included.

Discover the relative age of rocks by identifying sedimentary rock and observing its layers.

Learn how offspring are created through the processes of sexual and asexual reproduction.

An explanation of how dependent and independent variables are used during experimentation.

FSERL: Explanation of the hierarchical levels of living things.

Learn about the layers of the Earth.

An explanation of two very different perspectives of the solar system.

Learn about the Law of Conservation of Energy.

Click on the sliding bar and watch how the United States territory grew with the Louisiana Purchase, Florida Acquisitions, Texas Annexation, Oregon Country, and Mexican Cession.

Learn about the conservation of mass and energy as it applies to different living systems.

After Fidel Castro loosened emigration policies, some 125,000 Cubans landed on U.S. shores over a span of five months. The Mariel Boatlift of 1980 was a mass emigration of Cubans to the United States. The exodus was driven by a stagnant...

After Fidel Castro loosened emigration policies, some 125,000 Cubans landed on U.S. shores over a span of five months. The Mariel Boatlift of 1980 was a mass emigration of Cubans to the United States. The exodus was driven by a stagnant...

An account of the Spanish expedition led by Alonso Alvarez de Pineda in 1519 that explored the Gulf of Mexico between Florida and Cabo Rojo, Mexico. The explorers tried to establish the Panuco colony but were unsuccessful.

This encyclopedia article offers a thorough summary and analysis of the presidential election of 2000. Electoral maps, charts, photos and links are included. A good starting point for research, but because information may be edited, a...

Avogadro's law is stated in equation form. The lesson does not include much discussion, but it does relate the partial pressure and the total pressure of a gas sample to the mole fraction of its components.

[Free Registration/Login Required] This is a formative assessment task where learners are asked to estimate the population of Utah based on information given about its population density and the perimeter of its state boundaries. Samples...

This Science, Optics, and You site offers a biography of Roger Bacon with focus on his treatises on optics.

A brief informative site on optical illusions. Includes some beautiful examples of optical illusions such as spinning disks, color wheels, and Moire Pattern Generators.

Have you ever thought about your shadow? One way to learn about them is to make your own shadow box theater--once a very popular form of entertainment in Europe during the 1800s and early 1900s.

You can use shadows and a meter stick to measure very tall objects from the ground--and before you try this experiment yourself, see how it works with a Java applet that measures the height of a Tyrannosaurus Rex.

The concept of colors is discussed on this page. Read about primary colors, how complementary colors are created, what the process of color subtraction is, pigments and dyes, plus more. Also included are interactive Java tutorials.

Two scientists share the credit for discovering, and then interpreting, the phenomenon of electromagnetism.