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: Genetic drift, bottleneck effect, and founder effect
Learn how chance events can alter allele frequencies in populations, particularly when the populations are small, via genetic drift, the bo…
VideoGratis11 minuten
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Organic chemistry: Identifying functional groups
How to identify functional groups present in organic compounds Organic chemistry Sal and Jay cover topics covered in college organic chemis…
VideoGratis9 minuten
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Biology: Example of a signal transduction pathway
Illustrating the complexity of signal transduction with a MAPK pathway. How mutations in the pathway are linked to cancer. Biology Life is …
VideoGratis7 minuten
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Chemistry: Ionization energy trends
Definition of ion and ionization energy, and trends in ionization energy across a period and down a group. Chemistry Did you know that ever…
VideoGratis10 minuten
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Biology: Why biodiversity is distributed unevenly
Factors that influence the global distribution of biodiversity. Video by California Academy of Sciences. Biology Life is beautiful! From at…
VideoGratis11 minuten
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Biology: How tropomyosin and troponin regulate muscle contraction
How calcium ion concentration dictates whether a muscle contracts or not. Biology Life is beautiful! From atoms to cells, from genes to pro…
VideoGratis9 minuten
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Biology: Endoplasmic reticulum and Golgi bodies
Structure of the endoplasmic reticulum and Golgi body (Golgi apparatus). Their role in protein secretion. Biology Life is beautiful! From a…
VideoGratis12 minuten
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Biology: Saturated fats, unsaturated fats, and trans fats
Saturated fats, unsaturated fats, and trans fats. Biology Life is beautiful! From atoms to cells, from genes to proteins, from populations …
VideoGratis9 minuten
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Cosmology and astronomy: Detectable civilizations in our galaxy 5
More reasons why we haven't detected anything yet. Cosmology and astronomy It's a great, big universe out there. In this section of Khan Ac…
VideoGratis5 minuten
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Biology: LeBron Asks: Why does sweating cool you down?
LeBron asks Sal why sweating helps cool the body down. Biology Life is beautiful! From atoms to cells, from genes to proteins, from populat…
VideoGratis6 minuten
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Chemistry: First-order reaction example
Example of using the integrated rate law to solve for time and concentration, and calculating the half life for a first-order reaction. Che…
VideoGratis10 minuten
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Chemistry: Titration calculation example
Example of titrating strong acid, hydrochloric acid, with strong base barium hydroxide. How to calculate the unknown concentration when you…
VideoGratis8 minuten
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Biology: Ecosystem ecology: Links in the chain
Hank discusses ecosystems, trophic structure, and the flow of energy through food webs. Biology Life is beautiful! From atoms to cells, fro…
VideoGratis10 minuten
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Chemistry: Titration roundup
Making sure you fully understand titration curves by comparing the initial pH and pH at equivalence point for different types. Chemistry Di…
VideoGratis11 minuten
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Organic chemistry: Cis-trans isomerism
How to assign cis-trans terminology to double bonds. Organic chemistry Sal and Jay cover topics covered in college organic chemistry course…
VideoGratis5 minuten