lecture 10 cont water Flashcards
1
Q
Properties of water
A
- Water is a polar molecule
- Water has properties that are critical to all life
- Has a negative and a positive zone
Polarity - weak (transient)
2
Q
why is water polarity weak
A
- Polarity - weak (transient)
○ Hydrogen bonds form btwen water molecules
Individually weak bond, resulting in key characteristics of water
3
Q
Properties resulting from polarity and H bonds?
A
- Cohesion - holding together of like substances (water molecules)
- Adhesion - holding together of unlike substances (water molecules with other things)
- High specific heat - amount of energy (heat) needed to raise 1g of water by 1 degree C (absorbs a lot of heat- cools surroundings) (this is bc of polarity)
- High heat of vaporization - quantity of heat needed to convert 1g liquid to gas
4
Q
blue vs green water?
A
- Blue water - water that pools
- Green water - water in ecosystems
More green water than blue - more flowing through our ecological system
- Green water - water in ecosystems
5
Q
main imput of water flow in terrestrial system
A
Main input is precip
6
Q
desribe interception
A
- Interception - foggy environments - humidity in air is high enough for the water to condense onto surface - can be harvested in aired environments
Substancial (10-50%) in closed canopy forests
7
Q
describe Throughfall + stem floe
A
Throughfall and stemflow- interception of water by plants impacts the flow - stemflow = canopy draws the water down the stem - catching water and directing it so its more available to the plant
8
Q
how does stem flow enhance water flow
A
Stemflow - enhances flow by creating little spaces + stem adheres water = water goes down toward root system + help make it go deeper into the root system and less available to competition