1. Water

Question 1

Cohesion
-what it is
-2 uses/ examples

Answer 1

-attraction of water molecules to eachother (from H bonding)
-creates a transpiration pull to bring water from roots to leaves
-surface tension for insects to walk on and for debris to float on (food)

Question 2

Adhesion
-what it is
-1 example, use

Answer 2

-attraction of water molecules to cling to other polar surfaces
-helps with movement up a large plant (caprillay action of water clinging to xylem to prevent water colum from breaking)

Question 3

Boiling point (1)

Answer 3

H bonds allow a high boiling point of water (otherwise it would be -91 degress celcius)

Question 4

Heat Capacity of water (3)

Answer 4

-water has high heat capacity (twice as much as other coavalent liquids)
-means water can absorb/lose large amount of energy before temp changes significantly
-helps organisms maintain temperature and reuglates environment temperature

Question 5

Heat of Vapourization

Answer 5

-water has high heat of vapourization
-amount of energy absorbed/lost as a substance changed from liquid to gas, and vice versa
-means water is effective for evaporative cooling (sweat)