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biology 1

Topic 3, unit 1 vocab

QuestionAnswer
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 charge) attracts the oxygen side (negative charge) of a different water molecule. This is called a hydrogen bond
Cohesion Cohesion means that water molecules stick to each other.
surface tension Water has a high surface tension. In other words, water has a thin "skin" on its surface due to the water molecules sticking together.
adhesion he stickiness of water is responsible for two other important properties: Adhesion means that water molecules stick to other materials.
Capillary action Cohesion and adhesion work together to allow water to travel against gravity and move up a plant stem. This is called capillary action.
specific heat capacity Water has a high 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
expansion upon freezing As water decreases in temperature, the molecules move away from each other. This change causes an increase in volume, which leads to its expansion upon freezing.
universal solvent Water is called a universal solvent because it dissolves more substances than any other liquid.
Created by: user-2051414
 

 



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