Worksheet: Diffusion

In this worksheet, we will practice describing diffusion and explaining the effect of limiting factors on the rate of diffusion.

Q1:

Two students are discussing the effect of concentration gradient on diffusion. Student A says, “The higher the concentration gradient, the slower the rate of diffusion.“ But student B thinks the opposite. Who is correct?

  • AStudent B
  • BStudent A

Q2:

Fill in the blank: The term given to the difference between two areas of concentration is the concentration .

  • Agradient
  • Bdifference
  • Copposition
  • Dgraduation
  • Ecoordinate

Q3:

Diffusion allows substances to move. Which of the following is the best description of diffusion?

  • AThe net movement of solutes
  • BThe movement of water particles from an area of high concentration to an area of low concentration
  • CThe net movement of particles from an area of high concentration to an area of low concentration
  • DThe movement of particles against the concentration gradient using energy
  • EThe net movement of particles from an area of low concentration to an area of high concentration

Q4:

Which of the following has no effect on the rate of diffusion?

  • ASurface area
  • BConcentration gradient
  • CTemperature
  • DLength of the diffusion pathway
  • EColor of particles

Q5:

Which of the following statements about the movement of particles is correct?

  • AParticles move less when they are heated up.
  • BThe net movement of particles will be from an area of low concentration to an area of high concentration.
  • CParticles in gases have strong forces of attraction with each other.
  • DParticles move randomly.
  • EParticles move in predefined tracks.

Q6:

Which of the following best explains how an increase in temperature affects the rate of diffusion?

  • AWith an increase in temperature, the particles turn into a gas and move to areas of low concentration quickly.
  • BAn increase in temperature provides particles with more kinetic energy, so they move down the concentration gradient slower.
  • CAn increase in temperature means the particles gain more gravitational potential energy, so they move faster from the area of high concentration.
  • DAn increase in temperature provides particles with more kinetic energy, so they move down the concentration gradient faster.

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