Test - Diffuision Flashcards
What is diffusion
It is the spreading out of particles from an area of higher concentration to an area of lower concentration
Where does diffusion happen
In both liquids and gases because the particles in these substances are free to move about randomly
What makes the diffusion rate faster
The bigger the concentration gradient
What may affect the rate of diffusion
.the temperature
.the concentration gradient (difference in concentration)
.a large surface area through which diffusion can happen
. The diffusion distance
Example of diffusion in organisms
.Oxygen diffuses from the alveoli
.carbon dioxide diffuses from the blood
What does diffusion normally result in
Equilibrium which is the same number of particles on each sides
Does a large or small surface area make the diffusion rate faster
The larger surface area
What is the best things for diffusion
.high temperature
.short distance
.Steep concentration gradient
. A large surface area
What particles move in and out of cells
Molecules and ions
What makes particles in gas or solution contently move
Kinetic energy
What would happen if a drop of inc was added to a glass of cold water
The inc particles would gradually move throughout the glass of water through diffusion moving from a area of high concentration to low concentration
What would happen if the inc was added to warm water
It would spread quicker
What adaptations are present in the alveoli to aid diffusion
Large surface area
Thin walls
Good blood supply
Where does diffusion happen in mAmmels
Small intestine
What substances are diffused in the small intestine
Nutrients from the gut
What adaptation does the small intestine have to aid difusión
Lots of villi to give a large surface area
Good blood supply
Where does diffusion happen in a fish
Gills
Which substances are exchanged in a fish
Oxygen and carbon dioxide
What are the adaptations in the gills of a fish for diffusion
Good blood supply
Large surface area
Short distance for diffusion
where does diffusion happen in a plant
The leaves
What substances are exchanged by diffusion in a leaf
Oxygen
Carbon dioxide
What adaptations does a leaf have for diffusion
Flat
Thin
To find out the surface area of a shape what do you do
Length x heigh x number of sides
To find the volume what do you do
Length x height x width
