Diffusion - Quiz Grades 6 and 7

1. Which statement best describes the process of diffusion?

• The movement of substances from a region of low concentration to a region of high concentration
• The movement of substances from a region of high concentration to a region of low concentration
• The movement of substances from a region of low concentration to a region of equilibrium
• The movement of substances from a region of high concentration to a region of equilibrium

2. In which images do the arrows correctly show the direction of diffusion? Select all that apply.

• A
• B
• C
• D

3. "We say that diffusion occurs ___________________ a concentration gradient. " What is the missing word in this sentence? Give your answer as a single word with no period at the end.

4. "The pictures above show a _______________ protein transporting a molecule across the cell membrane". What is missing word in this sentence? Give your answer as a single word with no period at the end.

5. Which type of diffusion is shown in the pictures above? Give your answer as a single word with no period at the end.

6. Diffusion requires no extra energy from metabolism to transport substances. What kind of process is diffusion?

• Active
• Passive
• Static
• Lazy

7. The cell membrane can be described as a partially permeable membrane. What does this mean?

• It allows molecules to pass through it approximately 50% of the time
• It is permanently closed and molecules cannot enter or exit the cell
• It can open tiny holes called "pores" sometimes to let molecules through - the rest of the time it is impenetrable
• It allows some molecules to pass through it, while others are restricted

Tags

NGSS.MS-LS1-2

8. TRUE or FALSE: During diffusion, individual particles/molecules move randomly in both directions (high to low and low to high concentrations).

• True
• False

9. Use the information provided in the table to answer this question. In which cell will diffusion of glucose occur at the highest rate?

• Cell A
• Cell B
• Cell C

Tags

NGSS.MS-LS1-2

10. When will the diffusion of glucose stop?

• When there are equal concentrations of glucose inside and outside of the cell
• When the cell has a higher concentration of glucose than the outside environment
• When the glucose outside of the cell runs out / is fully absorbed by the cell
• When the cell has no energy left to continue the process of diffusion