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Phosphorus

Ch. 2: The Chemical Context of Life

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Biology
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Chapter 2 The Chemical Context of Life Camobell Bio 9th Edition

2.1 An element is a substance that cannot be broken down to other substances by chemical reactions. A compound is a substance consisting of two or more different elements combined in a fixed ratio. Essential elements are needed for a healthy life and to reproduce. Humans need 25, plants need 17 Oxygen (O), Carbon (C), Hydrogen (H) and Nitrogen (N)?make up 96% of living matter Calcium (Ca), Phosphorus (P), potassium (K), sulfur (S), and a few other elements accounting for most of the remaining 4% of an organism's mass. Trace elements are required by an organism in only minute quantities. ? 2.2 Protons and neutrons are electrically charged. Proton= positive, electron=negative, neutron=neutral

APES Chapter 20

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Environmental Science
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APES Environmental Science

Chapter 20 WATER POLLUTION Multiple Choice Questions CORE CASE STUDY Lake Washington, near Seattle, was degraded by the growth of which of the following? coliform bacteria protozoans snails aquatic plants cyanobacteria Level: Moderate Answer: E The degradation of Lake Washington resulted from the introduction by sewage treatment plants of which of the following? phosphorus nitrogen oxygen chlorine fecal material Level: Moderate Answer: A When researchers studying Lake Washington got no action from treatment plant managers, they did which of the following? went on to something new went to the Washington State legislature for help went to the EPA for help educated the public wrote more scientific articles Level: Moderate Answer: D

Flash Cards

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Anatomy and Physiology

Anatomy and Physiology The science of body structures and the relationships among them. The science of body functions. Levels of structural organization Chemical Cell Tissues Organ System Organism Chemical includes atoms- create molecules of(two or more atoms joined together. ESSENTIAL ATOMS TO THE BODY Carbon Hydrogen Oxygen Nitrogen Phosphorus Calcium Sulfur
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