Khan Academy: 2757 products
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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Chemistry: 2015 AP Chemistry free response 4
Calculating the molar solubility of calcium hydroxide in a 0.10 M calcium nitrate solution. From 2015 AP Chemistry free response 4. Chemist…
VideoFree9 minutes
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Biology: Molecular structure of glucose
Molecular structure of glucose. Monosaccharide structure. Linear and ring forms. Biology Life is beautiful! From atoms to cells, from genes…
VideoFree9 minutes
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Organic chemistry: Stabilization of a conjugate base: induction
How a conjugate base is stabilized by the inductive effect Organic chemistry Sal and Jay cover topics covered in college organic chemistry …
VideoFree5 minutes
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Biology: Simple animals: Sponges, jellies, & octopuses
Hank introduces us to the "simplest" of the animals, complexity-wise: beginning with sponges (whose very inclusion in the list as "animals"…
VideoFree11 minutes
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Biology: Animal behavior: foraging
Biology Life is beautiful! From atoms to cells, from genes to proteins, from populations to ecosystems, biology is the study of the fascina…
VideoFree2 minutes
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Biology: Passive transport and selective permeability
Passive transport and selective permeability. Passive transport through diffusion. Biology Life is beautiful! From atoms to cells, from gen…
VideoFree7 minutes
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Chemistry: Chemical reactions introduction
Reactants and products in reversible and irreversible chemical reactions. Chemistry Did you know that everything is made out of chemicals? …
VideoFree9 minutes
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Biology: Enzyme cofactors and coenzymes
The cofactors and coenzymes (organic cofactors) that help enzymes catalyze reactions. Biology Life is beautiful! From atoms to cells, from …
VideoFree10 minutes
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Cosmology and astronomy: The mohorovicic seismic discontinuity
The Mohorovicic Seismic Discontinuity- boundary between crust and mantle (or Moho) Cosmology and astronomy It's a great, big universe out t…
VideoFree6 minutes
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Cosmology and astronomy: Are southern hemisphere seasons more severe?
Are Southern Hemisphere seasons more severe because of the eccentricity in Earth's orbit? Cosmology and astronomy It's a great, big univers…
VideoFree7 minutes
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Chemistry: Small x approximation for small Kc
When the small x approximation is useful for solving equilibrium problems, and an example using the small x approximation when Kc is small …
VideoFree10 minutes
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Biology: The lungs and pulmonary system
The pulmonary system including the lungs, larynx, trachea, bronchi, bronchioles, alveoli and thoracic diaphragm. Biology Life is beautiful!…
VideoFree21 minutes
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Biology: The kidney and nephron
Overview of how the nephrons in the kidney filter blood and reabsorb water and other molecules. Biology Life is beautiful! From atoms to ce…
VideoFree19 minutes
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Organic chemistry: Organic chemistry naming examples 2
Organic chemistry naming examples involving branching and rings. Organic chemistry Sal and Jay cover topics covered in college organic chem…
VideoFree10 minutes
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Organic chemistry: Absorption in the visible region
Physical basis of our perception of color. Example of beta-carotene, the molecule that makes carrots orange. Organic chemistry Sal and Jay …
VideoFree5 minutes