Section 6.2:
Water and Diffusion
1.
__________ is the difference in concentration of a substance across spaces, such as with powdered drink mix and water.
a.
Brownian motion
b.
Density
c.
Concentration gradient
d.
Polarity
Hint
2.
Which of these does NOT affect the rate of diffusion?
a.
concentration of substances
b.
pressure
c.
temperature
d.
kinetics
Hint
3.
Which of these statements is true?
a.
Atoms in a covalent bond always share electrons equally.
b.
Water resists changes in temperature.
c.
Less than 20% of the composition of most organisms is water.
d.
Capillary action refers to factors that influence the rate of diffusion.
Hint
4.
What is this figure illustrating?
a.
a concentration gradient
b.
Brownian motion
c.
dynamic equilibrium
d.
polarity
Hint
5.
A polar molecule is a molecule with __________.
a.
an unequal distribution of charges
b.
random movement
c.
no kinetic energy
d.
the ability to resists changes in temperature
Hint
