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1________ is the passive movement of molecules as a result of random motion caused by heat.
A)Brownian movement
B)Dialysis
C)Osmosis
D)Diffusion


2Circle the correct answers. Molecules diffuse from an area of low / high concentration to an area of low / high concentration.


3The ________ of diffusion is determined by the steepness of the gradient and other characteristics of the specific molecule in question such as its size, polarity, or solubility.


4The ________ of diffusion depends on the presence of a gradient of concentration, heat, and pressure.


5


nonpolar molecules
6


osmosis
7


differentially permeable
8


polar molecules
9


diffusion
Answer choices:
A)molecules that have positively charged and negatively charged areas
B)molecules that have no local areas of positive or negative charge
C)passive, directional movement of molecules
D)describes a membrane that will allow certain molecules or ions to pass through it
E)diffusion of water across a differentially permeable membrane


10In today's lab, what is the model of a differentially permeable membrane that you will use?


11Phenolphthalein is a ________ indicator.
A)glucose
B)oxygen
C)starch
D)pH


12


hypertonic
13


solute
14


solvent
15


hypotonic
16


isotonic
Answer choices:
A)a solution with a relatively lower concentration of solutes
B)a fluid that dissolves substances
C)two solutions that have equal concentrations of solutes
D)a solution with a relatively higher concentration of solutes
E)a dissolved substance in a solution


17All molecules display kinetic energy
A)True
B)False


18The ________ variable is the variable that the experimenter actively controls to determine how it influences an observed phenomenon.


19The ________ variable is the event studied and expected to change in an experiment.


20The ________ variable is generally graphed on the x-axis of a graph.


21Circle the correct answers. Water moves from an area of low / high water potential to an area of low / high water potential.


22________ is the bursting of a cell caused by an influx of water.


23________ is the pulling away of the cell membrane from the cell wall when a plant cell looses water.


24What happens to a red blood cell when it is placed in a hypertonic solution?


25What happens to a plant cell when it is placed in a hypotonic solution?


26A fish in saltwater is in a ________ solution.


27Distinguish between diffusion and osmosis.





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