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WorksheetsBrownian Motion
Total questions: 10
Worksheet time: 10mins
Which diagram best represents the movement of a smoke particle displaying Brownian motion?
A
B
C
D
Light and fast moving particles can move heavier particles. Which one is a correct example of the light and the heavy particle?
Light : air molecule, Heavy : water molecule
Light : air molecule, Heavy : smoke particle
Light : smoke particle, Heavy : air molecule
Light : pollen grain , heavy : water molecule
What evidence does Brownian motion provide about molecules of a gas or liquid?
Molecules are close together
Molecules are far apart
Molecules move continuously in a straight line
Molecules move continuously and randomly
When using a microscope to look at smoke particles in air, Brownian motion is observed. What causes the smoke particles to move at random?
Smoke particles are hit by air particles.
Smoke particles are moved by convection currents in the air.
Smoke particles have different weights and fall at different speeds.
Smoke particles hit the walls of the container.
Very small pollen grains are suspended in a beaker of water. A bright light shines from the side. Small, bright dots of light are seen through a microscope. The dots move in rapidly changing, random directions. What are the bright dots?
pollen grains being hit by other pollen grains
pollen grains being hit by water molecules
water molecules being hit by other water molecules
water molecules being hit by pollen grains
Diagram 1 shows apparatus being used to observe smoke particles. Diagram 2 shows how a smoke particle moves randomly. Why do the smoke particles move randomly?
They are hit by air molecules.
They are less dense than air.
They are moved by convection currents.
They gain energy from the light.
A pollen grain in a beaker of still water is viewed through a microscope. Which diagram shows the most likely movement of the pollen grain?
A
B
C
D