water

Question 1

functions of water

Answer 1

-reactant
-water is a solvent: substances dissolve into it
-water transports substances
-water is a habitat
-water helps with temperature control

Question 2

structure of water

Answer 2

-polar molecule: hydrogen is delta negative and oxygen is delta positive
-hydrogen bonding: hydrogen bonds between O and H

Question 3

high specific heat capacity

Answer 3

-energy needed ti raise the temperature of 1 gram of a substance by 1 degrees
-H bonds give it a high specific heat capacity
-H bonds can absorb a lot of energy
-doesn’t experience rapid temp changes which makes it a good habitat

Question 4

high latent heat of evaporation

Answer 4

-takes a lot of heat to break the hydrogen bonds
-a lot of energy is used when water evaporates
-good for mammals to use to call down when sweating

Question 5

very cohesive

Answer 5

-attraction between molecules
-helps water flow making it good for transport

Question 6

lower density when solid

Answer 6

-when it freezes molecules are held further apart because the H bonds are more rigid
-this means ice floats
-this is useful for organisms to insulate water

Question 7

good solvent

Answer 7

-most substances are polar
-this means that the positive end of water will be attracted to the negative ion and vice versa
-this means the ions are surrounded by water and disolve