Worksheets6.2
Total questions: 10
Worksheet time: 9mins
Predict what would happen to the speed at which the food dye diff uses if you warm the liquid. Explain your prediction.
If the liquid is heated, heat energy is transferred to the particles and they move more rapidly. Diffusion happens because of the random movement of particles, so if the particles move slowly, diffusion will happen more quickly.
If the liquid is heated, heat energy is transferred to the particles and they move more rapidly. Diffusion happens because of the random movement of particles, so if the particles move more quickly, diffusion will happen more quickly.
Why is diffusion faster in a gas than in a liquid?
Diffusion is quicker in a gas because the particles have more energy and can move more freely as there are no forces of attraction to overcome.
Diffusion is slower in a gas because the particles have more energy and can move more freely as there are no forces of attraction to overcome.
Diffusion happens because particles move about (a)
Diff usion happens more quickly in gases than in (a)
The rate of diff usion can be aff ected by a number of factors such as changes in temperature, (a) and size of particle
Describe the observation Robert Brown made.
Robert Brown saw pollen grains floating on water with a microscope. They jiggled about with no pattern. They moved in a zigzag manner.
Robert Brown saw pollen grains floating on water with a microscope. They jiggled about with no pattern. They moved in a straight manner
How did Robert Brown explain what he saw?
He thought the movement was caused because the pollen grains were dead
He thought the movement was caused because the pollen grains were alive.
How did he know his explanation was wrong?
He knew his explanation was wrong because he saw the same type of movement when he looked at flecks of dust in water. He knew the dust was dead
He knew his explanation was wrong because he saw the same type of movement when he looked at flecks of dust in water. He knew the dust was not alive.
Pollen grains jiggle about faster when the temperature is higher.
When the temperature is higher, the water particles have more energy and move faster.
When the temperature is higher, the water particles have more energy and move slower
Pollen grains move about jerkily, in random directions.
The water particles are moving randomly, so they can hit the pollen grains from any side at any time. This makes the pollen grains move slowly
The water particles are moving randomly, so they can hit the pollen grains from any side at any time. This makes the pollen grains move randomly, too
