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Videos about the properties of Water
There are 10 videos in this category and 0 videos in 0 subcategories.
Category Videos
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Not Right For WatchKnowLearn
Ages: 12 - 18
3183 Views:
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This video is accompanied by text: "... focus on its physical properties. These include cohesion, adhesion, surface tension, and specific heat. Since the first three are closely related, we'll discuss them together.
Cohesion is the attractive force ...between similar molecules in the same phase. Water's hydrogen bonds are largely responsible for its cohesion. Cohesion can be thought of as the sum of all the hydrogen bonds in a collection of water molecules. Cohesion has important biological consequences. Cohesion helps hold a column of water together against the force of gravity. This lets the water from a tree's roots be transported all the way to its leaves.
A second physical property related to water's structure is adhesion. Adhesion is the attractive force between molecules in one phase, such as liquid, and different molecules in another phase, such as solid..."The video provides many examples and formulas.
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January 18, 2010 at 02:23 PM
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Not Right For WatchKnowLearn
Ages: 8 - 14
1358 Views:
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This video provides a step-by-step demonstration of an experiment of the effects of salt on water density. Using the concepts of density and buoyant forces, the experiment shows what happens when you drop an egg in a cup of water and what happens aft...er salt is added to the water. (6:29)
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November 28, 2010 at 11:41 PM
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Not Right For WatchKnowLearn
Ages: 12 - 18
1248 Views:
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Water and Life: Summary
From hippocampus.org, produced by University of California and Monterey Institute for Technology and Education
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This video is accompanied by text: "Most of water's chemical and physical properties can be traced to its polar structure. This means it has an uneven distribution of electron density. One important implication of the polarity of water is its ability... to dissolve ionic compounds and small polar molecules. Water molecules surround the ions or molecules as they dissociate from the crystal. In this example, the more positive end of the water molecule is oriented toward the negative chloride ion, and the more negative end of the water molecule is oriented toward the positive sodium ion.
Another important implication of water's polar structure is its hydrogen bonding..."
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January 18, 2010 at 02:26 PM
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Not Right For WatchKnowLearn
Ages: 14 - 18
1088 Views:
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Water
From learner.org, produced by University of Maryland
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The special chemical properties of water are explored, along with the need for its protection and conservation. Water is abundant on our planet, so we take it for granted, but not all water is usable. Water can easily become contaminated by human act...ivity, so chemists are developing ways to clean our water supplies. Ice, water, and steam are used by chemists for a variety of daily uses.
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March 25, 2010 at 11:24 PM
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Not Right For WatchKnowLearn
Ages: 11 - 18
1060 Views:
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This is a teacher-created, short animation that illustrates the structure of water. English captions appear to explain the images. (03:35) Music by Ben Hammer.
May 7, 2010 at 09:50 PM
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Not Right For WatchKnowLearn
Ages: 7 - 18
1258 Views:
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This is a short video that demonstrates the difference in density of cold water and warm water. It explains how the waters will mix or not mix according to their density and temperature. This is a good idea for a simple classroom experiment. (1:57)
December 1, 2010 at 08:57 AM
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Not Right For WatchKnowLearn
Ages: 12 - 18
1138 Views:
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The Nature of Water
From hippocampus.org, produced by University of California and Monterey Institute for Technology and Education
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This video is accompanied by text: "A key theme in biology is the relationship between structure and function. In order to appreciate the chemical and physical properties of water, we need to understand its molecular structure.
The chemical formula ...of water is H-2-O, meaning that each molecule of water contains two hydrogen atoms and one oxygen atom. Each hydrogen atom is connected to the oxygen atom with a covalent bond..."
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January 18, 2010 at 02:20 PM
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Not Right For WatchKnowLearn
Ages: 3 - 8
1252 Views:
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This is a three minute video shows how kids can make a walk on water type experiment. For younger folk.
September 11, 2010 at 01:17 PM
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Not Right For WatchKnowLearn
Ages: 3 - 18
628 Views:
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This one minute animation explains what water is and how it works. Very brief introduction.
January 11, 2012 at 08:48 PM
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Not Right For WatchKnowLearn
Ages: 12 - 18
469 Views:
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La fórmula H2O significa que una molécula de agua está formada por dos átomos de hidrógeno y uno de oxígeno. Entender cómo está formada una molécula de agua es muy sencillo con este vídeo. (2:17)
February 20, 2012 at 01:19 PM
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