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Water Properties

Hydrology

TermDefinition
What is polarity / polar? When a molecule (like water) has positive and negative sides
What is cohesion? When water molecules are attracted to each other
What is adhesion When water molecules are attracted to another substance
What is an example of cohesion? Water sticking together as it is dropped on a penny.
What is an example of adhesion? Water sticking to a spider web, a plant leaf, or the glass sides of a graduated cylinder.
What is the chemical formula for water? H2O (Two hydrogen and one oxygen)
What is capillary action? The movement of water up a thin tube, such as a plant stem, because of cohesion and adhesion
What is specific heat? The amount of energy needed to raise the temperature of a substance. Water has a high specific heat, which means it takes a lot of energy to heat up water.
What is a solvent? A substance that dissolves something
Why is water considered the "universal solvent?" Water is really good at dissolving a wide variety of polar substances. Water CANNOT dissolve nonpolar substances (like oil)
What is surface tension? The attraction between water molecules on the surface creates a thin layer that insects can walk on
What is density? The amount of stuff (matter) in a given space (volume). Density = mass divided by volume.
What is unique about the density of water? Water is LESS dense as a solid (ice) than as a liquid, so ice floats on top of water
Created by: cyclonescience
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