Plant Physiology (Biology 327) - Dr. Stephen G. Saupe; College of St. Benedict/ St. John's University; Biology Department; Collegeville, MN 56321; (320) 363 - 2782; (320) 363 - 3202, fax; ssaupe@csbsju.edu |
Water Properties Quiz
Short Answer Questions:
Fill-in-the-Blank Question:
1 | Term for a negative pressure | |
2 | Air bubbles that escape from a liquid under reduced pressure | |
3 | Mass movement of molecules from one area to another following a pressure gradient | |
4 | Random movement of individual molecules from one area to another | |
5 | Integral proteins in the membrane that acts as a channel for water passage | |
6 | Movement of water up a thin tube | |
7 | Universal solvent | |
8 | Substance dissolved in a solvent |
Cohesion/Adhesion Matching:
For each of the following, indicate if it is an example of cohesion (C),
adhesion (A), or both (B)
1 | attraction of likes | |
2 | attraction of unlikes | |
3 | water molecules hydrogen bond to one another | |
4 | water is absorbed by a paper towel | |
5 | water moves up a thin column |
Sketching Question: Assume the circle below represents a sodium ion. Draw in water molecules to represent the hydration shell surrounding this ion.
Multiple Choice Questions:
1. A lake is an example of a ________
environment.
a. hydric b. mesic c. xeric
2. Succulent leaves, thick cuticle,
stomata sunken in chambers and reduced leaf size is characteristic of a plant
living in a _________ environment.
a. hydric b. mesic c. xeric
3. Some insects can "walk on water"
because:
a. water is
adhesive c. water has a high surface tension
b. water is
transparent d. water can expand as it freezes
4. Which of the following bonds is
most likely to be �polarized?�
a. C � H d. O - H
b. C � C e. H - H
c. O - O
Calculation/Conversion Question: Megapascal is the metric unit for water potential. It is a pressure unit. 1 MPa is approximately equal to 10 atmospheres or 10 bars or 147 pounds per square inch. Convert the following.
1 | Racing bicycle tire (120 psi) | = | MPa | |
2 | Automobile tire (35 psi) | = | MPa | |
3 | Typical plant cell pressure (0.5 MPa) | = | psi | |
4 | Home plumbing pressure (30 psi) | = | MPA | |
5 | Water pressure under 15 feet (0.05 Mpa) | = | psi |
Water Property Matching:
Match each of the following with the appropriate property of water.
a. Density decreases on crystallization | e. High surface tension |
b. Heat of fusion | d. Specific Heat |
c. Heat of vaporization | f. Tensile strength |
1 | explains why people perspire and plants transpire | |
2 | explains why desert plants are succulents | |
3 | explains why raindrops are round | |
4 | explains why water acts like it has a skin | |
5 | explains why water can move up a thin tube | |
6 | ice floats | |
7 | involved in cooling organisms | |
8 | used by desperate farmers to protect fruit crops from frost damage | |
9 | thermal buffer | |
10 | water is a thermal buffer | |
11 | water resists evaporation | |
12 | water resists freezing | |
13 | water resists temperature changes |
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Last updated:
02/13/2009 � Copyright by SG
Saupe