Unit 1: Biochem - water's properties

Question 1

cohesion/adhesion (def)

Answer 1

cohesion: waters ability to bond with other water molecules

adhesion: waters bonding with other surfaces

Question 2

cohesion/adhesion (sigf.)

Answer 2

• allows water to have the surface tension it does (cohesion)
• allows capillary action (adhesion)
  - the way in which plants get
  water from their roots to their
  leaves

Question 3

solvent (def)

Answer 3

• it dissolves stuff
• caused by the polarity of water (elements are pulled apart as the different parts are attracted to the different charges it has)

Question 4

solvent (sigf.)

Answer 4

• dissolves and transports things throughout our cells/body

Question 5

hydrophilic

Answer 5

• water loving
• polar
• dissolve in water

Question 6

hydophobic

Answer 6

• water fearing
• nonpolar
• don’ dissolve in water

Question 7

water density (def)

Answer 7

solid water (ice) is less dense than liquid water because of the spread out hydrogen bonds

Question 8

water density (sigf.)

Answer 8

prevents lakes/oceans from freezing all the way to the bottom so life can continue underneath the ice

Question 9

specific heat (def)

Answer 9

• water’s resistance to change in temp (high)
• takes lots of energy because of hydrogen bonds

Question 10

heat of vaporization (def)

Answer 10

• energy it takes for water to become vapor (takes lots)

Question 11

heat of vaporization (sigf.)

Answer 11

• allows for evaporative cooling which moderates body temp
• when water goes from the liquid state to the solid state it creates heat