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U1T3 (Water)

TermDefinition
Polar Molecule A compound with one negatively charged side and one positively charged side is called a polar molecule.
Hydrogen bond The side with the hydrogen atoms (positive) attracts the oxygen side (negative) of a different water molecule.
Cohesion The occurrence of water sticking to other water molecules via hydrogen bonds. Water molecules stick to each other.
Surface tension When water has a thin skin on the surface due to molecules sticking together, this causes water to clump together in drops rather than out in a thin film.
Adhesion This means that water molecules stick to other materials.
Capillary action When cohesion and adhesion work together to allow water to travel against gravity and move up a plant stem.
Specific heat capacity Specific heat is the amount of heat required to change the temperature of a unit mass of a given substance by a unit amount. (Usually degrees) Ex: (water can absorb a lot of heat before turning hot)
Expansion upon freezing As water decreases in temp, the molecules move away from each other. This change causes an increase in volume, which leads to (term) . An increase in volume with the same mass.
Universal Solvent Water is called a universal solvent because it dissolves more substances than any other liquid, this means whatever water goes through ground or a living organism, it takes along valuable chemicals, minerals, and nutrients.
Created by: user-2051130
 

 



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