Diffusion

Passive Transport uses ____ energy

• no

• a lot of

• a little bit of

• some

What causes diffusion?

• The constant, random motion of molecules

• Magnetic attraction between atoms

• The nuclear forces that hold atoms together

• The tendency of atoms to form chemical bonds with one another

From fastest to slowest rate of diffusion, which of the following is in the correct sequence?

• Solids, liquids, gases

• Liquids, gases, solids

• Gases, liquids, solids

• Gases, solids, liquids

Why is diffusion so important in biology?

• It's the basic power source for most types of cells

• It allows substances to move across cells

• It prevents toxins from entering our bodies

• Without diffusion, cell division could not take place

What happens to the coffee particles when coffee is added to hot water?

• They sink to the bottom of the cup

• They spread out

• They clump together

• They freeze

What does a 'region with high concentration' mean?

• An area with a SMALL number of particles

• An area with a LARGE number of particles

• An area with an UNEVEN number of particles

• An area with no particles

Is there a concentration gradient in this image?

• No

• Yes

What is DIFFUSION?

• 
• 
• 
• 

Brownian motion is... (tick all the possible answers

• The random motion of particles as they collide with each other

• The random movement of particles in all directions

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

The name of the scientist who discovered Brownian motion

• James Brown

• Brownian Gregor

• Robert Brown

• Brownian James