Diffusion Review

Diffusion is the movement of molecules from an area of _____ concentration to an ______ concentration

• High, low

• Low, high

• Low, low

• High, high

Tags

NGSS.MS-LS2-3

After 20 mins, you would find the starch

• 1/2 in the bag and 1/2 in the beaker

• mostly in the bag and just some in the beaker

• all in the beaker

• all in the bag

Tags

NGSS.MS-PS1-2

When I light my favorite candle, the scent spreads throughout the room because

• scent molecules move from an area of high concentration to low concentration

• scent molecules move from an area of low concentration to high concentration

• the air begins to swirl around the melter sending the scent around the room

• all of the above are true

A cell is placed into a solution with starch and glucose. The glucose is able to move into the cell while the starch is not. The best explanation for this is

• the cell needs glucose more so the cell membrane knows it needs to pull it in

• glucose molecules are smaller than the starch molecules and can pass through the membrane

• starch molecules stick together and avoid passing through the membrane

• glucose is sweeter than starch

Tags

NGSS.MS-LS1-2

If a molecule cannot move into or out of a cell's membrane through diffusion, it is likely because

• the cell does not have enough energy to move the molecule.
• the cell does not need the molecule to perform its life processes.
• the molecule is too large to fit through the membrane.
• the cell does not make the enzyme needed to move the molecule.

Tags

NGSS.MS-LS1-2

Damage to which cell structure would most likely disrupt the water balance inside a cell?

• the nucleus
• the mitochondria
• the chloroplast
• the cell membrane

Tags

NGSS.MS-LS1-2

The diagram below represents red blood cells placed in three test tubes each contianing a different salt solution. Which solution would be most similar to the normal internal environment of the human circulatory system?

• solution A, only    

• solution A and solution B

• solution B, only

• solution A and solution C

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-5

NGSS.MS-LS1-1

Osmosis is the movement of _____ across a membrane.

• food
• energy
• oxygen
• water

During osmosis

• water moves from high to low concentration
• large or oddly shaped molecules move across a cell membrane
• water moves when energy is used
• proteins are built

Permeable means

• things can pass through
• the concentration levels are different
• it is permanent
• things are stuck