Understanding Diffusion and Osmosis

Where is there a low concentration of perfume?

• in the bottle

• on the hand

• in the room

• in the top

Osmosis

• Movement of water molecules through a semi-permeable mebrane from an area of low concentration to an area of high concentration

• the movement of particles from an area of high concentration to an area of low concentration

• Movement of water molecules through a partially-permeable membrane from an area of high concentration to an area of low concentration

• the diffusion of particles from an area of low concentration to an area of high concentration

Where is there a high concentration of bbq smoke?

• In the bbq pit

• In the house

• Two streets over

• In the atmosphere

What is the movement of water only across a cell or semi-permeable membrane?

• Osmosis

• Diffusion

• Active Transport

• Passive Transport

Which of these best describes how water will move?

• More will move out of the cell.

• More will move into the cell.

• Equal amounts will move into and out of the cell.

What 2 are differences between diffusion and osmosis?

• Osmosis involves a partially permeable membrane

• Diffusion involves the movement of all types of molecules, while osmosis involves the movement of water molecules only.

• Diffusion requires a semi-permeable membrane, while osmosis does not.

• Osmosis requires energy, while diffusion does not.

Which of the following is an example of osmosis?

• The smell of perfume spreading in a room.

• Sugar dissolving in tea.

• Water moving into a plant root from the soil.

• Salt spreading evenly in a pot of soup.

In which direction do molecules move during 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 high pressure to a region of low pressure.

• From a region of low pressure to a region of high pressure.

What is the role of a partially-permeable membrane in osmosis?

• It allows all molecules to pass through freely.

• It blocks all molecules from passing through.

• It allows only water molecules to pass through while blocking other molecules.

• It allows only large molecules to pass through while blocking small molecules.

Which of the following factors does NOT affect the rate of diffusion?

• Temperature

• Concentration gradient

• Surface area

• Colour of the molecules