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Diffusion and Osmosis

Total questions: 11

Worksheet time: 32mins

Name
Class
Date
1.

What is diffusion?

a)

When molecules move from a low concentration to a high concentration

b)

When molecules move from a high concentration to a low concentration.

c)

When there is no movement of molecules

d)

When molecules move everywhere regardless of concentration

2.

Which gummy bear was left overnight in salt water?

a)

Larger bear

b)

Smaller bear

3.
If you are stranded at sea why is it safer to drink urine than sea water?
a)
One cup of sea water has enough sodium to poison you.
b)
Sea water is hypertonic to your cells and will only further dehydrate you.
c)
Sea water is too isotonic to your cells and you will absorb too much water.
d)
The salt will cause high blood pressure and you will die from a stroke.
4.
A student noticed that placing wilted lettuce in a bowl of cool water caused the lettuce to become more crisp and firm. What is the best explanation for his observation?
a)
Water moved into the lettuce cells by active transport.
b)
Water moved into the lettuce cells by osmosis.
c)
Salt moved into the lettuce cells by diffusion.
d)
Water moved out of the lettuce cells by osmosis.
5.
Where is there a low concentration of dye?
a)
at the bottom of cup
b)
in the color
c)
at the top of cup 
d)
no concenteraion gradient
6.
Permeable means
a)
things can pass through
b)
the concentration levels are different
c)
it is permanent
d)
things are stuck
7.

Osmosis is specifically.....

a)

diffusion of water molecules through a semi-permeable mebrane from an area of low concentration to an area of high concentration

b)

the diffusion of particles from an area of high concentration to an area of low concentration

c)

diffusion of water molecules through a semi-permeable membrane from an area of high concentration to an area of low concentration

d)

the diffusion of particles from an area of low concentration to an area of high concentration

8.

Equilibrium is when....

a)

there is a large amount of substance on the inside of the cell and a small amount in the outside solution

b)

there is a small amount of substance on the inside of the cell and a large amount in the outside solution

c)

there is an equal amount of substance on either side of the cell membrane

d)

there are no particles on either side of the the cell membrane

9.
During osmosis
a)
water moves from high to low concentration
b)
large or oddly shaped molecules move across a cell membrane
c)
water moves when energy is used
d)
proteins are built
10.
In the given scenario what will happen?  An egg is placed in pure water for 48 hours.
a)
The egg will gain water and swell.
b)
Water will move in and out of the cell equally, and the cell with neither shrink nor swell.
c)
The egg will lose water and shrink.
11.
The picture below is an example of _________________.
a)
osmosis
b)
isotonic
c)
diffusion
d)
active transport