Mr. Andersen gives a brief description of osmosis. He explains how water moves from a hypotonic to a hypertonic solution across a semipermeable membrane. The video ends with a time-lapse demon in class.
Mr. Andersen shows you how to properly core potatoes for the osmosis lab. A thorough description of the lab protocol is included along with a brief description of percent mass change.
This "The Ovarian and Uterine Cycles" learning object is the from the Sumanas resource series. Sumanas offers a robust selection of content and services that are directed at enhancing the learning experience.
Oxidation and reduction in cellular respiration. Reconciling the biology and chemistry definitions of oxidation and reduction.
Oxidative Phosphorylation and Chemiosmosis (along with slight correction of previous video)
The resource, ''Periodic table visual aid (pdf)'' included in "Lesson 4 Composition of Matter ChemBonds Reactions" is a part of "Unit 02 Biomedical Systems" included in Health & Life Sciences HLS - Course 1.
Why does a balloon stick to your sweater? Rub a balloon on a sweater, then let go of the balloon and it flies over and sticks to the sweater. View the charges in the sweater, balloons, and the wall.
How does the blackbody spectrum of the sun compare to visible light? Learn about the blackbody spectrum of the sun, a light bulb, an oven, and the earth. Adjust the temperature to see the wavelength and intensity of the spectrum change. View the color of the peak of the spectral curve.
With your mouse, drag data points and their error bars, and watch the best-fit polynomial curve update instantly. You choose the type of fit: linear, quadratic, cubic, or quartic. The reduced chi-square statistic shows you when the fit is good. Or you can try to find the best fit by manually adjusting fit parameters.
With your mouse, drag data points and their error bars, and watch the best-fit polynomial curve update instantly. You choose the type of fit: linear, quadratic, cubic, or quartic. The reduced chi-square statistic shows you when the fit is good. Or you can try to find the best fit by manually adjusting fit parameters.
Simulate the original experiment that proved that electrons can behave as waves. Watch electrons diffract off a crystal of atoms, interfering with themselves to create peaks and troughs of probability.
Why do objects like wood float in water? Does it depend on size? Create a custom object to explore the effects of mass and volume on density. Can you discover the relationship? Use the scale to measure the mass of an object, then hold the object under water to measure its volume. Can you identify all the mystery objects?
How many calories are in your favorite foods?How much exercise would you have to do to burn off these calories?What is the relationship between calories and weight? Explore these issues by choosing diet and exercise and keeping an eye on your weight.
Pump gas molecules to a box and see what happens as you change the volume, add or remove heat, change gravity, and more. Measure the temperature and pressure, and discover how the properties of the gas vary in relation to each other.
This web page list the different way you can use the PhET Simulations.
Insert channels in a membrane and see what happens. See how different types of channels allow particles to move through the membrane.
Insert channels in a membrane and see what happens. See how different types of channels allow particles to move through the membrane.
When is a molecule polar? Change the electronegativity of atoms in a molecule to see how it affects polarity. See how the molecule behaves in an electric field. Change the bond angle to see how shape affects polarity. See how it works for real molecules in 3D.
When is a molecule polar? Change the electronegativity of atoms in a molecule to see how it affects polarity. See how the molecule behaves in an electric field. Change the bond angle to see how shape affects polarity. See how it works for real molecules in 3D.
Explore natural selection by controlling the environment and causing mutations in bunnies.