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The American Educational R-HOH2 quality of water test is used for environmental study, and allows students to conduct qualitative tests on samples of water from various sources for identifying pH, dissolved oxygen,

200lbs of lift! -- Electromagnetism was discovered in 1820 by Oersted. His discovery was a result of observing that a magnetic field was surrounding an electrical conductor, while current flowed through it.

This video series provides an easy to understand, global view of our planet's most urgent ecological and environmental issues. Written and designed to fulfill educational standards for life science and earth science,