biochem

Question 1

cohesion

Answer 1

water likes to stick to itself

Question 2

adhesion

Answer 2

water likes to stick to other things

Question 3

capillary action

Answer 3

the ability of a liquid to flow without the assistance of outside forces

Question 4

origin of earth (water)

Answer 4

• earth was originally very hot so any water would’ve evaporated or been vaporized
• hypothesized that large asteroids with water/ice collided with earth when it gained more of an atmosphere, gravity, and lower temperatures to trap cold water in a liquid state
• the distance between earth and sun allow water to exist on earth (goldilocks zone)

Question 5

water vs air

Answer 5

water
- more dense
- stronger buoyancy force
- higher viscosity
- higher specific heat
air
- the opposite

Question 6

transport of water in plants

Answer 6

• water is transported through a small hollow vessel of the xylem tissue
• xylems made up of cellulose
• water it transported “under tensions” through the xylem

Question 7

water is called “medium for metabolism”

Answer 7

• because water is a universal solvent
• the biochemical reactions of life inside cells occur in aqueous solutions

Question 8

surface tension

Answer 8

water resisting external forces due to cohesion of water molecules