Chapter 2 | Properties of Water Flashcards
one of the most important things
on earth.
Water
Without water, there could be
no traces of life on earth because both
__________and ____________
depend on the availability of water.
photosynthesis; animal metabolism
___________properties of water not
only return the water from the
atmosphere but also affect the
concentration and composition of the
remaining water and thus its sustainability
to the biota.
evaporative
In return, the water that returns to the
atmosphere has a major effect on the
climate by its effect on _____________
atmospheric heat transfer
It also determine the time lags
exhibited in heating and cooling that affect
the stratification of lakes.
physical characteristics of water
responsible for the existence of aquatic
systems
physical characteristics of water
a simple molecule composed of
two positively charged hydrogen atoms
and a negatively charged oxygen atom that
are covalently bonded.
Water
Molecules of the water
two positively charged hydrogen atoms
and a negatively charged oxygen atom that
are covalently bonded.
Molecules of the water
two positively charged hydrogen atoms
and a negatively charged oxygen atom that
are covalently bonded.
it dictates how water
interacts with other molecules.
polarity
the charge differential of water
polarity
the measure of mass per volume.
Density
d=m/v
The average density of an object equals its
total mass divided by its total volume.
The density of
water
about 775 times greater than the air
they do not need strong stems or skeletons
required on land.
large aquatic organisms
reason for frequent cracking of expanding lake ice
due to expansion of the water surface upon freezing
This plays an important role in the mechanical breakdown of rock.
“physical weathering”
Periodic freezing and thawing is effective in shattering rock and exposes more rock surface to dissolution
“biological/ chemical weathering”
measure of liquid’s resistance
to flow and is responsible for the frictional resistance or viscous drag that water offers to swimming fish or sinking algae.
Dynamic viscosity
The reciprocal of viscosity
“fluidity”
a measure of ease of flow
fluidity
it plays a very important role in
temperature regulation.
water
The characteristic of water to attract to
other substances.
Adhesion
The characteristic of water to attract to
another water molecule.
Cohesion