Complete Sixth Grade Biology Lesson on Cells. Mitosis Dance. Cells Cells - Parts of the Cell Rap. Virtual Labs: Using the Microscope. Elements of the Periodic Table. The Chemistry of Life: The Human Body. Editor's Note: This occasional series of articles looks at the vital things in our lives and the chemistry they are made of.
You are what you eat. But do you recall munching some molybdenum or snacking on selenium? Some 60 chemical elements are found in the body, but what all of them are doing there is still unknown. Roughly 96 percent of the mass of the human body is made up of just four elements: oxygen, carbon, hydrogen and nitrogen, with a lot of that in the form of water. The remaining 4 percent is a sparse sampling of the periodic table of elements. Some of the more prominent representatives are called macro nutrients, whereas those appearing only at the level of parts per million or less are referred to as micronutrients. These nutrients perform various functions, including the building of bones and cell structures, regulating the body's pH, carrying charge, and driving chemical reactions. However, this does not exhaust the list of elements that you need.
The Star In You. By Peter Tyson Posted 12.02.10 NOVA scienceNOW "Our planet, our society, and we ourselves are built of star stuff.
"—Carl Sagan, Cosmos Here's an amazing fact for your next cocktail party: Every single atom in your body—the calcium in your bones, the carbon in your genes, the iron in your blood, the gold in your filling—was created in a star billions of years ago. All except atoms of hydrogen and one or two of the next lightest elements. They were formed even earlier, shortly after the Big Bang began 13.7 billion years ago. As hard as it might be to believe, every atom in your body, astrophysicists say, originated billions of years ago in a star or in the explosive aftermath of the Big Bang. It's true, according to astrophysicists. How is this so? The start of it all The story begins at the beginning, as in the Big Bang. Over 13 billion years since the Big Bang, hydrogen and helium still make up most of the visible matter in the universe. How? Finding the Science Behind Science Fiction through Paired Readings.
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If you've got lessons plans, activities, or other ideas you'd like to contribute, we'd love to hear from you. More Find the latest in professional publications, learn new techniques and strategies, and find out how you can connect with other literacy professionals. More Teacher Resources by Grade Your students can save their work with Student Interactives. Science Fiction and Scientific Literacy. Bringing Fantasy and Science Fiction into the Classroom. Writing Fiction Based on Real Science - NYTimes. Interactive Science Sites - Resources 4 Educators.
Science Buddies. AGPA P-16 Lesson Plans. For Science Educators.