OpenSciEd
Open Sci Ed: 7.4 Matter Cycling & Photosynthesis
Where does food come from and where does it go next? This unit helps students figure out that they can trace all food back to plants, including processed and synthetic food. They obtain and communicate information to explain how matter...
Khan Academy
Khan Academy: Molarity vs.osmolarity
Molarity and osmolarity are two distinct concepts. Molarity (M) is the number of moles of solute per liter of solution. The unit of molarity is the mole (mol). Osmolarity (Osm/L) is the total concentration of all solutes in the solution....
Khan Academy
Khan Academy: The Mole and Avogadro's Number
An explanation the mole (named for molecule) and Avogadro's Number. One mole of a substance is equal to 6.022 times 10 to 23rd power units of that substance (such as atoms, molecules, or ions). The number 6.022 time 10 to 23rd power is...
National Institute of Educational Technologies and Teacher Training (Spain)
Ministerio De Educacion: Aparatos Circulatorio Y Excretor
This unit explores two important systems related to the functions of nutrition: the circulatory and excretory system. It contains 9 interactive activities.
Khan Academy
Khan Academy: Molarity vs. Molality
Learn how molarity and molality differ. The molality of a solution is equal to the moles of solute divided by the mass of solvent in kilograms, while the molarity of a solution is equal to the moles of solute divided by the volume of...
Khan Academy
Khan Academy: Introduction to Lab Values and Normal Ranges
An introduction to lab values and normal ranges of a blood analysis. A universal model for lab values is explained. Reasons for a value not being with a normal range is discussed.
Khan Academy
Khan Academy: Introduction to Lab Values and Normal Ranges
An explanation of lab values following a blood test using a universal model. Also discussed are reasons why a number may be outside of a normal range. These variances include: age, gender, individual laboratory techniques, and the given...
Khan Academy
Khan Academy: What Is Equivalent?
The equivalent is the amount of a substance which will either react or supply with one mole of hydrogen ions and acid-base reactions or do the same with one mole of electrons in a redox reaction.
Khan Academy
Khan Academy: What's Inside Blood?
An explanation of blood from the time it is drawn from the arm to its centrifugation to an analysis of the three components of plasma, white blood cells, and red blood cells.
Khan Academy
Khan Academy: Molarity, Molality, Osmolarity, Osmolality, and Tonicity What's the Difference?
See how each of these terms tells us something different about a solution.
Khan Academy
Khan Academy: Calculate Your Own Osmolarity
Learn how to use three lab values (Sodium, glucose, and BUN) to approximate your plasma osmolarity.
Other
K 3 Learning Pages: Reptiles and Amphibians
Come and discover more about reptiles and amphibians when you explore this awesome resource. This site is filled with useful links.
Khan Academy
Khan Academy: Tonicity Comparing 2 Solutions
Find out how tonicity is determined by ions that don't move across membranes and how it affects movement of water.