Mrs Browne's CB1 - Transport of substances Quiz

Which statement best describes diffusion?

• the movement of particles from a low to high concentration.

• the movement of particles from a high to low concentration.

• Only happens in water

• The movement of particles but energy is needed

A can of deodrant is sprayed in area 1. How will the particles move?

• Area 2 (low concentration) to Area 1 (high concentration)

• Area 1 (High concentration) to Area 2 (low concentration)

• They will stay in area 1 only.

If I sprayed perfume in one corner of a room, eventually someone the otherside of the room could smell it. The particles are moving by_____?

• Osmosis

• Active transport

• Diffusion

Select all the options which are examples of diffusion. (4 correct answers)

• Smelling dinner cooking in your bedroom

• How milk mixes in tea

• When someone farts in a lift

• How you can smell burnt toast all around the house

• How plants take in water through their roots

Osmosis is very simliar to diffusion, but there is one BIG difference. What is it?

• It only happens in space

• It only happens in water

• It only happens in air

• It only happens in butter

Which statement best describes osmosis?

• movement of water across a semi-permeable membrane from a high concentration of water to a low concentration of water

• movement of water across a semi-permeable membrane from a low concentration of water to a high concentration

• water doesn't move

What is a semi-permeable membrane?

• Only lets some things through (like a cell membrane)

• Lets everything through

• Doesn't let anything through

Which direction would the water molecules move?

The orange circles are solute (sugar)

The blue circles are water

• From left (low water concentration) to right (high water concentration)

• From right (high water concentration) to left (low water concentration)

• The water would not move

Which side has a higher concentration of water?

The light yellow circles are solute e.g. sugar/salt

The blue circles are water molecules

• Right handside

• Left handside

• Both are the same

Some red blood cells have been left in a salty solution. Why have they shrivelled up?

• The water concentration is lower in the cell. So the water moves into the cell by osmosis, from a low water concentration to a higher water concentration.

• The salt has made the cells shrink.

• The water concentration is higher in the cell. So the water moves out of the cell by osmosis, from a high water concentration to a low water concentration.