4.7/8. (9/16-9/18) Temperature & Water Relations Flashcards
What is supercooling?
solutes are produced inside internal fluids to lower freezing temperature
What is glycerol?
What is estivation?
summer hibernation
Why do animals estiviate?
to escape the high temperature or dry season
How does the sooty tern get away with nesting on the open sand?
evaporatively cool because they can afford to evaporate their water storage
what is relative humidity?
amount of water in the air
Why is relative humidity
How do we calculate relative humidity?
what is water vapor density
what is saturation water vapor density?
amount of water you can put in the air
temperature dependent
what is pressure?
total atmospheric pressure
exerted by all gasses
saturation water vapor pressure
the pressure exerted if the air was filled with as much water as it could hold
water vapor pressure
water vapor partial pressure
vapor pressure deficit
what is the matric potential of soil?
really clinging to remain water
what is the matric potential of very saturated soil?
what is diffusion?
high concentration to low
what is osmosis
diffusion of water through a semi-permeable membrane
what is
using energy to move water against concentration
what is an isotonic solution?
no net water movement between the inside and outside membrane
hypertonic
- water concentration is greater inside than outside
- water leaves the cell causing collapse
hypotonic
net water movement into the cell
causes rupture
how does the water get into its roots?
Why does water move into plant roots?
what do stomate do?
generate force like a straw
sunny and dry
