Diffusion Quiz

Diffusion is the free movement of particles from an area of __________ concentration to an area of ________ concentration.

• High to high

• High to low

• Low to low

• Low to high

Particles in diffusion move __________ the concentration gradient

• Up / Against

• Down / With

• Opposed to

• Perpendicular to

An increase in temperature does what to diffusion?

• Speeds it up

• Slows it down

• Stops it

• No effect

If there is more oxygen in the blood than in an organ, which direction will the oxygen move?

• Out of the organ and into the blood

• Out of the blood and into the organ

• Back and forth between the blood and organ

• Stays in the lungs

Tags

NGSS.HS-LS1-3

Where is there a higher concentration of smoke?

• Inside the grill

• In the house

• In the atmosphere

• Two streets down

What is diffusion?

• When molecules move randomly

• Molecules only move if there is wind

• Molecules move randomly from an area of high concentration to low concentration

• Molecules move in an organized line from an area of high concentration to low concentration

What will happen to the red particles in this picture? (pretend the membrane is fully permeable)

• The red particles will stay where they are

• The red particles will move to the left

• The red particles will move to the right

• The red particles cannot move

When do particles stop diffusing?

• Never. A molecule is always diffusing

• When there is no longer a concentration gradient and the concentration is the same throughout.

• When the temperature is decreased

• When the particle stops moving

Tags

NGSS.HS-PS1-5

Where is there a low concentration of the scented candle?

• In the room

• At the top of the candle

• At the bottom of the candle

• There is no low concentration of the candle

What does it mean when I say that diffusion is passive transport?

• It does not require an input of energy to occur

• It requires a lot of energy

• It requires energy only while diffusion is happening, but no energy is needed once diffusion stops

• Diffusion lets things pass through