Khan Academy: 2757 producten
Khan Academy is an organization on a mission. We're a not-for-profit with the goal of changing education for the better by providing a free world-class education for anyone anywhere.
All of the site's resources are available to anyone. It doesn't matter if you are a student, teacher, home-schooler, principal, adult returning to the classroom after 20 years, or a friendly alien just trying to get …
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Biology: Genes and biodiversity
How does the gene pool contribute to biodiversity? Learn how genetic diversity within populations contributes to species survival. Video by…
VideoGratis7 minuten
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High school biology: Introduction to cilia, flagella and pseudopodia
Introduction to cilia, flagella and pseudopodia High school biology Basic cell structures We'll learn about the complex and beautiful struc…
VideoGratis4
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Chemistry: Using reduction potentials
Example of using table of standard reduction potentials to calculate standard cell potential. Chemistry Did you know that everything is mad…
VideoGratis6 minuten
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Chemistry: Formal charge and dot structures
Definition of formal charge, and how minimization of formal charge can help choose the more stable dot structure. Chemistry Did you know th…
VideoGratis12 minuten
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Biology: Red blood cells
Oxygen uptake by hemoglobin in red blood cells. Biology Life is beautiful! From atoms to cells, from genes to proteins, from populations to…
VideoGratis17 minuten
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Biology: Introduced species and biodiversity
Biology Life is beautiful! From atoms to cells, from genes to proteins, from populations to ecosystems, biology is the study of the fascina…
VideoGratis10 minuten
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High school biology: Meet the gastrointestinal tract!
High school biology The digestive and excretory systems Topic: Science Learn about all the sciences, from physics, chemistry and biology, t…
VideoGratis5 minuten
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Biology: Phases of meiosis II
How sister chromatids separate to form gametes. Prophase II, metaphase II, anaphase II, telophase II. Biology Life is beautiful! From atoms…
VideoGratis11 minuten
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Cosmology and astronomy: Correction calendar notation
Correcting the time difference calculation by taking into account that there is no year 0 Cosmology and astronomy It's a great, big univers…
VideoGratis4 minuten
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Biology: Overview of glycolysis
Overview of the basics of glycolysis. Biology Life is beautiful! From atoms to cells, from genes to proteins, from populations to ecosystem…
VideoGratis14 minuten
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Biology: Prokaryotic and eukaryotic cells
Prokaryotic and eukaryotic cells. Bacteria and archaea. Biology Life is beautiful! From atoms to cells, from genes to proteins, from popula…
VideoGratis7 minuten
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Biology: Community ecology II: Predators
Hank explores adaptations of predators, the evolutionary arms race between predators and prey, and various types of predation (including he…
VideoGratis10 minuten
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High school biology: Introduction to nucleic acids and nucleotides
Introduction to nucleic acids (e.g., DNA and RNA) and nucleotides High school biology Biological macromolecules There's an old saying, "You…
VideoGratis6
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Biology: Carbon 14 dating 1
Carbon 14 Dating 1 Biology Life is beautiful! From atoms to cells, from genes to proteins, from populations to ecosystems, biology is the s…
VideoGratis10 minuten
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Biology: Competitive inhibition
Seeing how an inhibitor can "compete" for an enzyme with the intended substrate. Biology Life is beautiful! From atoms to cells, from genes…
VideoGratis7 minuten