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- 1. Multiple Choice
Diffusion occurs only in gases
True
False
- 2. Multiple Choice
How do the particles move in diffusion?
From a region of low concentration to a region of high concentration
From a region of high concentration to a region of low concentration
From a region of low concentration to a region of low concentration
From a region of high concentration to a region of high concentration
- 3. Multiple Choice
How does the body remove carbon dioxide from the cells?
The body cells converts carbon dioxide into carbon monoxide
The body cells don't expel the waste, they store them for future use
The body cells expel the carbon dioxide through the use of the nucleus
The carbon dioide diffuses out of the body cells and into the bloodstream due to differences in the concentration gradient
- 4. Multiple Choice
The movement of particles is __________, resulting in the particles being spread throughout the container
Structured
In a straight line
Random
In curved, way motions
- 5. Multiple Choice
What does a 'region with high concentration' mean?
An area with a SMALL number of particles
An area with a LARGE number of particles
An area with an UNEVEN number of particles
An area with no particles
- 6. Multiple Choice
The picture below is an example of _________________.
osmosis
isotonic
diffusion
active transport
- 7. Multiple Choice
How long does diffusion last?
Until the concentration of particles in the system is equal
Until a region in the system has a smaller concentration of particles than the other
Until a region in the system has a greater concentration of particles than the other
Until the particles disappear from the system
- 8. Multiple ChoiceHow does the concentration gradient affect diffusion?The greater the concentration difference the faster the rateThe smaller the concentration difference the faster the rateThe greater the concentration the slower the rate
- 9. Multiple ChoiceHow does surface area affect the rate of diffusion?Greater the surface area the slower the rateGreater the surface area the faster the rateSmaller the surface area the faster the rateSurface area does not affect diffusion
- 10. Multiple Choice
How does increasing temperature affect the rate of diffusion?
molecules move in orderly manner
Gives molecules more energy increasing the rate
Takes energy away from molecules slowing down the rate
collision of molecules slows down
- 11. Multiple ChoiceWhy is diffusion important?Molecules need to be moved out of cellsCells need a constant supply of some molecules whilst getting rid of othersThere is no other way of transporting things in or out of a cellIt requires energy which is always being produced and needs to be used up
- 12. Multiple Choice
Where is there a low concentration of dye?
at the bottom of cup
in the color
at the top of cup
no concenteraion gradient
- 13. Multiple ChoiceThe faster an object moves, the ________ kinetic energy it has.morelessnone of the aboveall of the above
- 14. Multiple Choice
There are 24 molecules inside this cell. AFTER diffusion, how many molecules would be inside and how many would be outside?
There would be 12 inside and 12 outside
There would be 0 inside and 24 outside
The cell will stay the same with 24 inside
There will be 20 inside and 4 outside
- 15. Multiple Choice
Why does the tea move out of the tea bag and into the water?
The warm water forces it out of the tea bag
There is equal concentration of water and tea
There is a higher concentration of tea in the bag and less in the water
There is a lower concentration of tea in the bag and more in the water
- 16. Multiple Choice
_________ particle size allows for a larger surface area to be exposed for the reaction.
larger
smaller
- 17. Multiple Choice
Why do large multicellular organisms need transport systems while simple unicellular organisms do not?
Large organisms have a much smaller surface area to volume ratio compared to smaller ones.
Diffusion does not work in large multicellular organisms.
Unicellular organisms have a much smaller surface area to volume ratio than multicellular organisms.
- 18. Multiple Choice
Diffusion can occur in solids, liquids and gaseous materials
True
False
- 19. Multiple Choice
Which of the following factors does NOT have a direct influence on the rate of diffusion?
Molecule size
Temperature
Color
Concentration
- 20. Multiple ChoiceWhich diagram best shows the end result of diffusion?FGHJ
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