Diffusion and Osmosis

Match the following

• Allows some materials to pass through but keeps other materials out

• Concentration

• Amount of substance in a given space

• Diffusion

• Diffusion of water molecules through a selectively permeable membrane

• Selectively Permeable Membrane

• Movement of particles from an area of concentration to an area of lower concentratioin

• Osmosis

Match the following

• Process by which oxygen and carbon dioxide is moved into a cell

• Osmosis

• When water particles move from an area of higher concentration to an area of lower concentration

• Selectively Permeable Membrane

• Can be compared to a window screen

• Diffusion

Diffusion is the movement of particles from __1__ concentration to __2__ concentration until they are __3__ spread out.

• 1

• higher

• 3

• lower

• 2

• evenly

Which best describes which directions molecules move during diffusion?

• from an area of equilibrium to an area of high concentration

• from an area of equilibrium to an area of low concentration

• from an area of low concentration to an area of high concentration

• from an area of high concentration to an area of low concentration

What is the process by which water diffuses across a selectively permeable membrane?

• active  transport

• osmosis

• simple diffusion

• facilitated diffusion

You decide to buy a new fish for your freshwater aquarium. When you introduce the fish into its new tank, the fish swells up and dies. You later learn that it was a fish from the ocean. what could have caused the fish to swell up and die?

• The water from the cells of the fish began to move out causing the cells to shrink.

• The salt moved into cells causing the fish to die.

• The freshwater from the aquarium moved into cells of the fish.

• The different concentrations of salt and freshwater caused the fish to be in an isotonic state.

Tags

NGSS.MS-LS1-2

NGSS.MS-LS2-4

Osmosis is the passage __1__ molecules from a __2__ concentrated solution to a __3__ concentrated solution through a __4__ .

• water

• higer

• lower

• semi-permeable membrane

Select all answer choices that are examples of diffusion

• The student sitting next to you just came from gym class and forgot to shower and you can tell.

• After sitting in the bathtub for hours, your fingers start to look like prunes.

• The girl sitting two rows ahead of you put on too much perfume this morning.

• One way to get rid of slugs in your garden is to sprinkle salt on them, so they shrivel up.

• Yum! Something smells good. The neighbors are cooking on the grill.

Select all answer choices that are examples of osmosis

• Gargling with salt water when you have a sore throat causes your swollen throat cells to shrink and feel better.

• After sitting in the bathtub for hours, your fingers start to look like prunes.

• Oxygen molecules move from the air sacs in the lungs across the cell membranes.

• The student sitting next to you just came from gym class and forgot to shower and you can tell.

• One way to get rid of slugs in your garden is to sprinkle salt on them, so they shrivel up.