Diffusion

Question 1

How do particles move?

Answer 1

Particles move RANDOMLY, and after a bit they end up EVENLY SPACED
Natural tendency for stuff to SPREAD OUT

Question 2

What is DIFFUSION?

Answer 2

It is the GRADUAL MOVEMENT of particles from places where there are LOTS of them, to places where there are FEWER of them

Question 3

Diffusion Definintion

Answer 3

DIFFUSION is the SPREADING OUT of PARTICLES from an area of HIGH CONCENTRATION to an area of LOW CONCENTRATION

Question 4

What states can diffusion take place in?

Answer 4

Solutions and Gases;

particles can move about randomly in these substances

Question 5

The BIGGER the DIFFERENCE in concentration…

Answer 5

…the FASTER the diffusion rate.

Question 6

Give an example of diffusion through gas

Answer 6

When perfume diffuses through the air in a room

Question 7

Dissolved substances can move [ ] of celsl through [ ]

Answer 7

in and out

diffusion

Question 8

Only small molecules can diffuse through cell membranes, give some examples…

Answer 8

Oxygen
Glucose
Amino Acids
Water

Question 9

Give some examples of BIG MOLECULES that can’t diffuse through CELL MEMBRANES

Answer 9

Starch

Proteins

Question 10

Particles move from [ ] concentration to [ ] concentration through a cell membrane

Answer 10

High

Low

Question 11

What happens due to the particles moving randomly through the cell membrane?

Answer 11

Particles move through both ways, but if there are a lot more particles on one side of the membrane, there is a net overall movement from that side