chapter three

Question 1

cohesion

Answer 1

the sticking together of particles of the SAME substance, ex: molecules sticking together

Question 2

adhesion

Answer 2

dissimilar particles or surfaces cling to one another, ex: water molecules sticking to the inside of the plant tube

Question 3

surface tension

Answer 3

tendency of liquid surfaces at rest to shrink into the minimum surface area possible

Question 4

kinetic energy

Answer 4

a form of energy that an object or a particle has by reason of its motion

Question 5

thermal energy

Answer 5

produced when a rise in temp causes atoms and molecules to move faster and collide

Question 6

specific heat

Answer 6

amount of heat that must be added to one unit of mass

Question 7

heat sink

Answer 7

absorb excessive unwanted heat

Question 8

heat of vaporization

Answer 8

heat needed to turn liquid into a vapor, without a rise in temp

Question 9

water density: temperature

Answer 9

when water is heated it expands and becomes less dense

Question 10

water density: salinity

Answer 10

more salt dissolved in water becomes more dense

Question 11

water density: effects

Answer 11

influences buoyancy, temp regulation and nutrient distribution

Question 12

why does ice float on water?

Answer 12

ice is less dense than water

Question 13

solvent

Answer 13

liquid/substance that dissolves solute

Question 14

solute

Answer 14

dissolved in solvent

Question 15

solution

Answer 15

liquid mixture in which the solute is uniformly distributed within the solvent

Question 16

aqueous solution

Answer 16

solution in which water is the solvent

Question 17

hydrophilic

Answer 17

having tendency to mix with or be wetted by water

Question 18

hydrophobic

Answer 18

tend to repel or fail to mix with water

Question 19

solute concentration

Answer 19

amount of solute dissolved in a given amount of solvent

Question 20

molarity

Answer 20

form of expression for concentration