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Osmosis and Diffusion

Total questions: 70

Worksheet time: 59mins

Name
Class
Date
1.

Select the 4 correct answers. A particle _____.

a)

can be a solid.

b)

can be a liquid.

c)

can be a gas.

d)

has random motion.

e)

remains stationary.

2.
Which diagram best shows the end result of diffusion?
a)
F
b)
G
c)
H
d)
J
3.
A student put a few drops of lemon juice into an uninflated balloon.The student tied a knot in the balloon, placed it in a shoe box, and covered it with a lid. The following day, the student opened the box and was able to smell lemon in the box. Through what process were molecules able to pass through the balloon?
a)
respiration
b)
fermentation
c)
osmosis
d)
diffusion
4.

Diffusion is the movement of molecules from an area of _____ concentration to an ______ concentration

a)

High, low

b)

Low, high

c)

Low, low

d)

High, high

5.
If there is more oxygen in the blood than in an organ, which direction would the oxygen move?
a)
Out of the blood
b)
Into the blood
6.

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

7.

The picture below is an example of _________________.

a)

osmosis

b)

isotonic

c)

diffusion

d)

active transport

8.
What is diffusion?
a)
when molecules move 
b)
when molecules move from a high concentration to a low concentration.
c)
no movement 
d)
molecules move everywhere
9.

Diffusion occurs only in solids

a)

True

b)

False

10.

How long does diffusion last?

a)

Until the concentration of particles in the system is equal

b)

Until a region in the system has a smaller concentration of particles than the other

c)

Until a region in the system has a greater concentration of particles than the other

d)

Until the particles disappear from the system

11.

When does diffusion stop?

a)

After a day and a night

b)

When the particles are evenly spread out

c)

When there are no particles left

d)

When all the particles leave the system

12.

What is thermal expansion?

a)

The transfer of thermal energy between materials by the collisions of particles

b)

Is a decrease in a material's size when temperature decreases

c)

An increase in a material's size when temperature increases

d)

diffusion of air freshener

13.

Suppose that a container of liquid is heated so that thermal expansion occurs. Why might the liquid overflow after heating?

a)

the volume of liquid contracts

b)

the volume of liquid expands

c)

the liquid remains the same volume

14.
Objects gain heat and _________. 
a)
expand
b)
contract
15.
The liquid in the thermometer rises when it is placed in the hot water because ___________. 
a)
it gains heat from the hot water and expands.
b)
loses heat from the hot water and contracts. 
c)
the surrounding air is too warm. 
d)
the liquid is boiling. 
16.

How does an increase in temperature affect diffusion?

a)

Diffusion speeds it up

b)

Diffusion slows it down

c)

Diffusion has no effect

17.
The faster an object moves, the ________ kinetic energy it has. 
a)
more
b)
less
c)
none of the above
d)
all of the above 
18.
All matter is made of _____ that are constanly moving.
a)
insulators
b)
particles
c)
convection
d)
pieces of plastic
19.
As the kinetic energy of the molecules in a substance increases, the temperature of the substance __________.
a)
increases
b)
decreases
20.
What happens to particles when they are heated?
a)
They speed up and spread out
b)
They slow down and compress
c)
They stop moving
d)
They move closer together and speed up
21.
Osmosis is the movement of _____ across a membrane.
a)
food
b)
energy
c)
oxygen
d)
water
22.
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
23.
Permeable means
a)
things can pass through
b)
the concentration levels are different
c)
it is permanent
d)
things are stuck
24.
The diffusion of water through a semi-permeable membrane is called?
a)
Osmosis
b)
Cell wall
c)
Diffusion
d)
Respiration
25.
Where is there a high concentration of water?
a)
in the flower
b)
cannot be determined by picture.
c)
in the vase
d)
in the leaves
26.
What is the definition of  Selective Permeability?
a)
The movement of materials across the cell membrane that requires NO ENERGY from the cell.
b)
The movement of materials through (or across) the cell membrane
c)
The ability of the cell membrane to allow some things to pass through while preventing other things from passing through.
d)
The movement of molecules from an area of high concentration to a area of low concentration 
27.
In the given scenario what will happen to the organism: salt is poured onto eggplant.
a)
Water will move out of the eggplant cells and the cells will shrink.
b)
Water will move out of the eggplant cells and the cells will swell.
c)
Water will move into the eggplant cells and the cells will swell.
28.
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.
29.
Which way will the water molecules move during osmosis?
a)
Out of the cell, so the cell shrinks.
b)
Out of the cell, so the cell swells.
c)
Into the cell, so the cell shrinks.
d)
Into the cell, so the cell swells.
30.
Water will move INTO a cell in a(n) _______ solution
a)
Hypertonic
b)
Hypotonic
c)
Isotonic
d)
Gravy
31.
Ideally, your cells should be in a(n) _______ solution
a)
Hypertonic
b)
Hypotonic
c)
Isotonic
d)
Cola
32.
If you enjoy rubbery carrots, place them in .....
a)
Cold Water
b)
Hot Water
c)
Distilled Water
d)
Salt Water
33.
An animal cell that is surrounded by fresh water will burst because the osmotic pressure causes
a)
water to move into the cell.
b)
water to move out of the cell.
c)
solutes to move into the cell.
d)
solutes to move out of the cell.
34.
What information could be added to make this diagram a more complete model of osmosis in red blood cells?
a)
Information about the temperatures of the cell and of the solution.
b)
The relative concentrations of solute inside and outside the cell.
c)
Show that energy is required for the osmosis to occur.
d)
Show the cell holding its shape as osmosis occurs.
35.

 If the volume of a cell 

increases when it is placed 

in a solution, that solution is

 said to be __________ to the 

cell

a)
 hypertonic
b)
subatomic
c)
 isotonic
d)
 hypotonic 
36.
The picture below is an example of _________________.
a)
osmosis
b)
isotonic
c)
diffusion
d)
active transport
37.
Osmosis is the movement of _____ across a membrane.
a)
food
b)
energy
c)
oxygen
d)
water
38.
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
39.
Permeable means
a)
things can pass through
b)
the concentration levels are different
c)
it is permanent
d)
things are stuck
40.
What is the definition of  Selective Permeability?
a)
The movement of materials across the cell membrane that requires NO ENERGY from the cell.
b)
The movement of materials through (or across) the cell membrane
c)
The ability of the cell membrane to allow some things to pass through while preventing other things from passing through.
d)
The movement of molecules from an area of high concentration to a area of low concentration 
41.
Passive transport requires no
a)
concentration gradients
b)
osmosis
c)
motion
d)
energy
42.
The picture is an example of...
a)
active tranport
b)
passive transport
c)
diffusion
d)
osmosis
43.
What is diffusion?
a)
when molecules move 
b)
when molecules move from a high concentration to a low.
c)
no movement 
d)
molecules move everywhere
44.
_______ regulates what enters and leaves a cell.  
a)
Cell Membrane
b)
Nucleus
c)
Mitochondria
d)
Cytoplasm
45.
How does distance affect diffusion?
a)
Shorter the distance the faster the rate
b)
The bigger the distance the faster the rate
c)
It doesn't matter - molecules will always diffuse at the same rate
46.
How does the concentration gradient affect diffusion?
a)
The greater the concentration difference the faster the rate
b)
The smaller the concentration difference the faster the rate
c)
The greater the concentration the slower the rate
47.
Why is having a control in experiments important?
a)
It makes sure the independent variable is the reason for the results
b)
To know what you originally started off with
c)
To add another group of results making sure there's more data
48.
Which of these molecules is not likely to enter a cell by diffusion?
a)
A protein
b)
Oxygen
c)
Glucose
d)
Water
49.
What is diffusion?
a)
Actively moving molecules from a low to high concentration
b)
Actively moving water from a low to high concentration
c)
Moving molecules along a concentration gradient until they are evenly spread
50.
Why does diffusion not need energy?
a)
It occurs too fast for energy to be generated
b)
Molecules move spontaneously from low to high concentrations
c)
Molecules move spontaneously from high to low concentrations
d)
Molecules move slowly so there is no need for energy
51.
How does surface area affect the rate of diffusion?
a)
Greater the surface area the slower the rate 
b)
Greater the surface area the faster the rate
c)
Smaller the surface area the faster the rate
d)
Surface area does not affect diffusion
52.
How does increasing temperature affect the rate of diffusion?
a)
Increases enzyme activity increasing the rate
b)
Gives molecules more energy increasing the rate
c)
Takes energy away from molecules slowing down the rate
d)
Decreases enzyme activity and decreases the rate
53.
How does the cell membrane control which molecules can enter and leave the cell?
a)
Only allows big molecules through
b)
Only allows small molecules through
c)
Only allows molecules with Carbon through
d)
Only allows water through
54.
Why is diffusion important?
a)
Molecules need to be moved out of cells
b)
Cells need a constant supply of some molecules whilst getting rid of others
c)
There is no other way of transporting things in or out of a cell
d)
It requires energy which is always being produced and needs to be used up
55.

Osmosis is the movement of _____ across a selectively permeable membrane.

a)

food

b)

energy

c)

oxygen

d)

water

56.

What is Osmosis?

a)

movement of water from equal concentrations

b)

movement of water through a selectively-permeable membrane from high to low water concentration.

c)

Movement of water high to low water concentration

d)

movement of water through a selectively-permeable membrane from low to high water concentration.

57.

What in the cell is selectively permeable?

a)

cell membrane

b)

cell wall

c)

cytoplasm

d)

nucleus

58.
Which of the following does not have a cell wall?
a)
animal cells
b)
bacteria cells
c)
plant cells
d)
fungi
59.

The diagram shows two chambers with different concentration of molecules separated by a selectively permeable membrane. Predict what will happen to the water molecules ?

a)

move from B to A due to diffusion

b)

move from B to A due to osmosis

c)

move from B to A due to active transport

d)

move from A to B due to osmosis

60.
 An animal cell placed in a hypertonic (salty) solution will
a)
Stay the same
b)
Shrink- get smaller
c)
Swell- get bigger
61.
If a cell is placed in a hypotonic solution, the cell will _______.
a)
stay the same
b)
swell (get bigger)
c)
shrink (get smaller)
62.

Where will the water go?

a)

Into the cell

b)

Out of the cell

c)

Equally in & out - it's isotonic

d)

There is no water

63.
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.
64.

If the dots represent sugar what direction will the water flow?

a)

Into the cell

b)

Out of the cell

c)

Both equally (equilibrium)

65.

What will happen to the cell in the given solution?

a)

Swell up

b)

Shrink

c)

Stay the same

66.
Ideally, your cells should be in a(n) _______ solution
a)
Hypertonic
b)
Hypotonic
c)
Isotonic
d)
Cola
67.

Osmosis needs _____ energy.

a)

zero

b)

a lot of

c)

10 kilowatts

d)

some

68.

If the percentage represents sugar, what direction will water flow?

a)

Into the cell

b)

Out of the cell

c)

Into and out equally (equilibrium)

69.

Which cell would water move into?

a)
b)
c)
d)
70.

Which cell would water move out of?

a)
b)
c)
d)

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