In this worksheet, we will practice describing diffusion and explaining the effect of limiting factors on the rate of diffusion.
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
Fill in the blank: The term given to the difference between two areas of concentration is the concentration .
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
Which of the following has no effect on the rate of diffusion?
- ASurface area
- BConcentration gradient
- DLength of the diffusion pathway
- EColor of particles
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.
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.