Osmosis and Diffusion

Osmosis and Diffusion

Similar but different...

​Moves things from a high concentration to a low concentration.

So, it will move something from where there is a lot to an area where there is less.

​​Diffusion

Needs to have a cell membrane.
Only moves water (H2O)

Water moves through the cell membrane from where the is a high concentration of water to where there is a low concentration of water.

​​Osmosis

Multiple Choice

What is diffusion?

• particles moving from a high concentration to a low concentration

• particles moving from a low concentration to a high concentration

• water molecules moving into and out of a cell

• water moving through the water cycle

Multiple Choice

The diffusion of water across a cell membrane is ___.

• diffusion

• osmosis

• selectively permeable

• concentration

Labelling

Move the label to show the concentration level on each side of the container.

Drag labels to their correct position on the image

Low

High

1. Moves water molecules

2. It moves the water molecules across a cell membrane.

3. Water will go from an area of high concentration to low concentration

1. Does not require a cell membrane

2. Water is not being moved

3. Particles that are moved will go from an area of high concentration to low concentration

​REMEMBER:

Multiple Choice

When salt moves from an area of greater concentration (more salt) to lower concentration (less salt) this is ___

• Diffusion because salt is moving

• Diffusion because water is moving

• Osmosis because salt is moving

• Osmosis because water is moving

Dropdown

What is this an example of?​ ​

Select answer

Dropdown

What is this an example of?​

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Dropdown

What is this a picture of? ​

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Dropdown

What direction will the small red dots move?​

Select answer

Multiple Choice

How will the water molecules move?

• out of the cell

  (there are more water molecules inside the cell than around it)

• into the cell

  (there are more water molecules around the cell than inside it)

• the water molecules won't move because there is the same amount inside and outside of the cell

Multiple Choice

How will the water molecules move?

• out of the cell

  (there are more water molecules inside the cell than around it)

• into the cell

  (there are more water molecules around the cell than inside it)

• the water molecules won't move because there is the same amount inside and outside of the cell

Multiple Choice

How will the water molecules move?

• out of the cell

  (there are more water molecules inside the cell than around it)

• into the cell

  (there are more water molecules around the cell than inside it)

• the water molecules won't move because there is the same amount inside and outside of the cell

Multiple Choice

How will the water molecules move?

• out of the cell

• into the cell

• the water molecules won't move