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Elements in the Human Body and What They Do

Oxygen (O) – 65% of body weight Atomic Number: 8 Oxygen is the most abundant element in the human body. It’s mainly found bound to hydrogen in the form of water. Water, in turn, … See more

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URL: https://sciencenotes.org/elements-in-the-human-body-and-what-they-do/

What Is Homeostasis in Biology

WebHomeostasis is the ability of an organism to maintain a stable internal environment despite changes in external conditions. This process involves various …

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Human Anatomy Worksheets and Study Guides

WebThis is a collection of free human anatomy worksheets. The completed worksheets make great study guides for learning bones, muscles, organ systems, etc. …

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Mutualism Definition and Examples in Biology

WebMutualism is a form of symbiosis in which both species benefit. In biology, mutualism is defined as an ecological relationship between two or more species in which …

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Leukocytes or White Blood Cells

WebA normal white blood cell count in adults ranges from 4,500 to 11,000 leukocytes per microliter of blood. However, this varies based on age, gender, and …

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Biotic and Abiotic Factors in Ecology

WebBiotic and abiotic factors are the two components of an ecosystem. Biotic factors are the living things, like plants, animals, and fungi. Abiotic factors are non-living …

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Herbivores, Carnivores, and Omnivores

WebThe animal kingdom is diverse, with species adapted to a wide range of diets. These diets fall into three broad categories: herbivorous, carnivorous, and omnivorous. …

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The pH Scale of Common Chemicals

WebThe pH scale shows how acidic or basic a chemical is in aqueous solution (mixed with water). The scale runs from 0 (most acidic) to 14 (most alkaline or basic), …

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What Is Reverse Osmosis

WebReverse osmosis or RO is a water purification process that presses water through a semi-permeable membrane. Particles, molecules, and ions that are larger than …

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Independent and Dependent Variables Examples

WebHere are several examples of independent and dependent variables in experiments: In a study to determine whether how long a student sleeps affects test …

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Alkaline vs Acidic

WebIn chemistry, alkaline refers to something with a high pH (>7), while acidic refers to a substance with a low pH (<7). The terms “alkaline” and “acidic” are …

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What Is Deuterium

WebDeuterium is one of only five stable isotopes that has both an odd number of protons and an odd number of neutrons. Usually, doubly-odd atoms are unstable and …

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What Is Deionized Water

WebDefinition, Uses, Risks. Deionized water is water that has nearly all of its dissolved minerals removed by ion exchange resins. Deionized water is water that is …

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What Is Background Radiation

WebSources and Risks. This entry was posted on April 6, 2021 by Anne Helmenstine (updated on May 10, 2021) Sources of background radiation include radon …

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Renewable and Nonrenewable Resources

Web10 Examples of Nonrenewable Resources. Coal: A fossil fuel primarily for electricity generation and industrial processes. Crude Oil: A liquid fossil fuel that yields …

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Mercury Element Facts (Hg or Atomic Number 80)

WebElement Name: Mercury. Element Symbol: Hg. Atomic Number: 80. Atomic Weight: 200.592. Classification: Transition Metal or Post-Transition Metal. State of …

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Placebo Effect – What It Is and How It Works

WebA placebo is a fake treatment, which can have genuine therapeutic value, called the placebo effect. Examples of placebos include sugar pills and saline solution …

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