[Free Registration/Login may be required to access all resource tools.] This study guide summarizes key principles used in relative dating. Includes a few questions to check for understanding.

Illustrated essay on the principle of unity, also known as harmony, explains how the grouping techniques of alignment, proximity, similarity, and continuity can be used to create a unified, harmonious composition.

A site dedicated to help students prepare for the AP Physics B test. This specific site reviews fluid mechanics including hydrostatic pressure, buoyancy, Archimedes' principle, Bernoulli's equation, and fluid flow continuity. Site...

[Free Registration/Login may be required to access all resource tools.] Introduces Steno's laws, which allow scientists to decipher the geological events that occurred and the order in which they took place, including how the relative...

This site from Artlex provides a thorough definition of the Principle of Design known as Rhythm. There are links to other sources and terms as well as visuals from artists such as Klee, Matisse and Mondrian that show further examples.

An 81-page slideshow that looks at the principles of geology with respect to relative dating, at different concepts describing geological processes, at absolute age and radiometric dating, at the eons and eras in the geologic time scale,...

This MathWorld tutorial provides detailed overviews of the concepts and theorems associated with geometry. Most of the Math World sites are extensive and some require higher math knowledge to understand, links to terms and topics are...

This is the second in three articles that demonstrates such confusing word pairs as "continuous," which means unbroken, and "continually," which describes something that occurs repeatedly over a period of time.

This site, from the University of California, provides several problems from beginning differential calculus, as well as beginning integral calculus. The problems can be accessed by clicking on the link, and the information provided is...

Provides a detailed explanation of how the Venturi Effect works in fluid mechanics and how it can be proven using Bernoulli's equation. Also discusses applications of the Venturi Effect in the real world.

A slideshow aimed at journalists to teach them the basic principles of framing a field of view and composing a shot.

A very lengthy page from friesian.com discussing Bohr's theory of electronic energy levels and the explanation of commonly observed atomic emission line spectra. The concept of a photon and Einstein's observation of the photoelectric...

This brief explanation of punctuated equilibrium includes paragraphs on the history of the theory and the controversy surrounding it.

[Free Registration/Login may be required to access all resource tools.] Looks at how stratigraphy can be used to determine the relative ages of rocks, how unconformities occur, ways to match rock layers in different areas, and how...

How does soil in its native condition function? How do forests and native grasslands produce plants and animals in the complete absence of fertilizer and tillage? What are the principles by which these soils function? The answers to...