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Categories: Gr 9-10 Science
Introduction Since the distances to the stars cannot be measured directly, astronomers use a variety of techniques including triangulation and parallax, comparison of absolute and apparent magnitude,... read more
Introduction No matter what precautions are taken, sooner or later an accidental chemical spill is likely to occur in your laboratory. A responsible science teacher will take steps to prevent spills,... read more
https://youtu.be/E0Li1k5hGBE Armed with the most sophisticated vision and fastest strike of any predator on Earth, the mantis shrimp is an unsuspecting threat. read more
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