Diffusion Through a Membrane

Describe diffusion:

• the movement of molecules higher concentration to an area of lower concentration

• the synthesis of molecules higher concentration to an area of lower concentration

• the movement of molecules lower concentration to an area of higher concentration

• the synthesis of molecules lower concentration to an area of higher concentration

Identify the substance/molecule that will not diffuse.

• Starch

• Glucose

• Iodine

Tags

NGSS.MS-PS1-2

Identify the substance(s)/molecule(s) that will diffuse.

• Starch

• Glucose

• Iodine

Tags

NGSS.MS-PS1-2

Identify the substance that was added to the outside of the plant cells that caused the change observed.

• salt water

• fresh water

• distilled water

• glucose

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-1

Identify which molecule is diffusing into the cell.

• A

• B

Tags

NGSS.MS-LS2-3

The following image shows a plant cell in a normal environment. Which picture shows what a plant cell would like if salt was added to the outside?

• 
• 

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-5

What is the starch indicator?

• Iodine

• Bromothymol Blue

• Benedict's Solution

• Glucose

Tags

NGSS.MS-PS1-2

What color does the starch indicator turn when it comes in contact with starch?

• blue-black

• blue

• orange-red

• yellow

Tags

NGSS.MS-PS1-2

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

Tags

NGSS.MS-LS1-2

Passive transport requires no

• concentration gradients
• osmosis
• motion
• energy