Movement of Substances

Diffusion is the movement of ____ from a region of _____ to a region of _____.

• substances, higher concentration, lower concentration

• substances, higher potential, lower potential

• water, higher concentration, lower concentration

Select the image that best represents diffusion.

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Osmosis is the movement of ____ from a region of _____ to a region of _____, through a _____.

• substances, higher concentration, lower concentration, concentration gradient

• water molecules, higher water potential, lower water potential, partially permeable membrane

• water molecules, higher concentration, lower concentration, partially permeable membrane

What differentiates osmosis from diffusion? [2]

• Direction of movement of substances

• Substance transported

• Presence of partially permeable membrane

• Energy reqiurement

Which region has the highest water potential?

• In the leaves

• Cannot be determined from the photo

• In the vase

• In the stem

What is the direction of osmosis?

• From the left to the right.

• From the right to the left.

• There is no direction as osmosis is not occurring.

Which side of the solution has a higher water potential? What about concentration?

• Left: higher water potential, right: higher concentration

• Left: higher concentration, right: higher water potential

In which direction will water move?

• Into the cell

• Out of the cell

• Equally in & out

• There is no water

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-3

Dissolved gases (e.g. CO₂, O₂) enter and leave plant cells by which process?

• Photosynthesis

• Respiration

• Diffusion

• Osmosis

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-6

NGSS.MS-LS2-3

A student noticed that placing wilted lettuce in a bowl of cool water caused the lettuce to become more crisp and firm. What is the best explanation for his observation?

• Salt moved out of the lettuce cells by diffusion.

• Water moved into the lettuce cells by osmosis.

• Salt moved into the lettuce cells by diffusion.

• Water moved out of the lettuce cells by osmosis.

Tags

NGSS.MS-LS1-2