Properties of water Flashcards
What type of molecule is water?
A polar molecule (dipole) with hydrogen bonds
Benefits of water?
- carries minerals and chemicals
- aids dispersal of sediments and seeds etc.
- sculpts the landscape
- transparent
Properties of water
- cohesive behaviour
- resists changes in temperature
- high heat vaporization
- expands when it freezes
- high adhesion
- high solubility of chemical compounds in water
What is responsible for the high solubility of substances in water?
The polar nature
What is heat capacity?
The amount of heat required to change the temperature by a given amount.
What is latent heat?
amount of energy released or absorbed by a substance during a change of state that occurs without temperature
What is density?
The mass per unit volume
Cuttlefish
can alter what’s inside the structure which alters its density and buoyancy
Teleost fish
internal gas filled organ, establishes bladder at preferred depth
Squid
can change sodium ions for ammonium ions which creates a low density fluid
Crustaceans
a strategy over winter months so they sink to depths, liquid fat stores solidify and they go neutrally buoyant
