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: Conservation and restoration ecology
Hank discusses different types of biodiversity, as well as how biodiversity can be measured, preserved, and restored. Biology Life is beaut…
VideoGratis10 minuten
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Organic chemistry: Pi bonds and sp2 hybridized orbitals
Pi bonds and sp2 Hybridized Orbitals Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basic understa…
VideoGratis14 minuten
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Chemistry: Worked example: Identifying isotopes and ions
Identifying isotopes and ions from the number of electrons, protons and neutrons, and vice versa. Chemistry Did you know that everything is…
VideoGratis4 minuten
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Biology: DNA as the "transforming principle"
How Griffith and later Avery, McCarty and MacLeod found strong evidence that DNA is the "transforming principle" that encodes genetic infor…
VideoGratis10 minuten
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Biology: Tertiary structure of proteins
How side chain interactions can impact the tertiary structure of proteins. Biology Life is beautiful! From atoms to cells, from genes to pr…
VideoGratis7 minuten
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Cosmology and astronomy: Parsec definition
Parsec Definition Cosmology and astronomy It's a great, big universe out there. In this section of Khan Academy, you'll learn about the bra…
VideoGratis8 minuten
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Chemistry: States of matter
Introduction to the states or phases of matter. Chemistry Did you know that everything is made out of chemicals? Chemistry is the study of …
VideoGratis19 minuten
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Biology: Big Guns: The Muscular System
Hank tells us the story of the complicated chemical dance that allows our skeletal muscles to contract and relax. Biology Life is beautiful…
VideoGratis12 minuten
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Chemistry: Autoionization of water
Autoionization of water into hydronium and hydroxide ions. Chemistry Did you know that everything is made out of chemicals? Chemistry is th…
VideoGratis11 minuten
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Chemistry: pH of salt solutions
The pH of a salt solution is determined by the relative strength of its conjugated acid-base pair. Salts can be acidic, neutral, or basic.…
VideoGratis14 minuten
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Cosmology and astronomy: Becoming a red giant
Becoming a Red Giant Cosmology and astronomy It's a great, big universe out there. In this section of Khan Academy, you'll learn about the …
VideoGratis12 minuten
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Biology: Electrotonic and action potentials
Two different types of changes in the membrane potential of a neuron. Biology Life is beautiful! From atoms to cells, from genes to protein…
VideoGratis10 minuten
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Organic chemistry: Ozonolysis
Alkene cleavage using ozone. Organic chemistry Sal and Jay cover topics covered in college organic chemistry course. Basic understanding of…
VideoGratis14 minuten
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Chemistry: More rigorous Gibbs free energy / spontaneity relationship
More formal understanding of why a negative change in Gibbs Free Energy implies a spontaneous, irreversible reaction. Chemistry Did you kno…
VideoGratis14 minuten
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Cosmology and astronomy: Understanding calendar notation
Difference between BC, BCE, AD and CE. A little bit about the birth of Jesus as well. Cosmology and astronomy It's a great, big universe ou…
VideoGratis10 minuten