Week 2: Water and its properties

Question 1

Structure of a Water molecule?

Answer 1

it has h-bonds, therefore slightly polar!

Gives is a whole bunch of special attributes

Question 2

H-bonds man what for water?

Answer 2

In general, its just very sticky to itself (Adheadin) and to other things (cohesion)

• LArge Head capacity (lots of E to change states. Makes water very stable in temp)
• Ice is less dense than liquid water (the structure of h-bonds when frozen cause spaces = air pockets to float)
• Great Solvent (dude to plolar charge!)

Question 3

More on the water as a solvent

Answer 3

[g] down with inc in temp, [soids] inc with inc temp

connects to how warming oceans means less co2 absorption, less temp mitigating

Question 4

Water pressure patterns

Answer 4

pressure increases as you go deeper (more stuff pushing down at the top, gasses are there more easily)
also means that gasses are most soluble

Question 5

Buoyancy in water

Answer 5

causes by displacement of water by the object (gravity pushed down, the water then pushed up)
most buoyant in high density.

Question 6

Movement of h2o

Answer 6

Laminar (straight) vs turbulent (crazy flow)

• > more crazy, more nutrient/gas mixing
• > Turb inc with rocks and velocity
• What moves it? Solar en (potential kinetic) gravity (release of potential kinetic)Wind (rotational movement at top) Coriolis effect (earths rotation, only on big scale)

Question 7

What is diffusion?

Answer 7

Particles that travel from are of low to high [ ].
molecular diff -> realizes on particle movement. Slows
Transport diff-> realises on turb flow and is fast! MOre dominion in flowing water

Question 8

Light into water process

Answer 8

Important? photosynthesis, and water heating

• > from air to water, refracts slightly
• . Reflect: depends on how smooth the water is (m s, m r)
• absorption: depends on the amount of particles in water, does it help scatter light?
• attenuation (reduction of light e) in as production inc
• —low productive water bluer, less productive at depths

Question 9

Heat balance in the water

Answer 9

effects water temp and bio activity

• . comes from mostly solar energy (refraction) diffusion
• > differences in heat lead to stratification and water currents