Osmosis Egg Lab

The egg represents a giant ________, now that the shell has been dissolved by vinegar (acetic acid).

• bacterium
• cell
• bubble
• organelle

What is the most abundant substance in a living cell?

• protein
• water
• calcium
• yolk

The egg membrane allows some substance to pass through, while blocking others.  This means it is ________________ .

• mesh screen
• semi-permeable
• pliable
• flexible

If the egg is in distilled (100%) water overnight, what might happen?

• egg will shrink as water leaves
• egg mass will stay constant
• egg may burst as water enters
• most absorb water until it achieves equilibrium with solution

The amount of water in the cell will change as the environment changes. When the concentration of water is equal on both sides of the membrane, we say the cell  is __________

• hypertonic
• hypotonic
• isotonic

Tags

NGSS.HS-LS1-3

Which way will the water move by osmosis in this situation?

• into the cell
• out of the cell
• won't move

Tags

NGSS.HS-LS1-3

Perhaps we could attach a color dye to the salt to see if it can make it through the semi-permeable membrane.  What do you think:  Can salt move through the membrane into the egg?

• yes (molecule is small enough)
• no (molecule is too large)

Tags

NGSS.MS-PS1-2