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Solutions, Colloids, and Suspensions
The table below summarizes the various properties of solutions, colloids, and
suspensions. Study the table. Then, answer the questions that follow.
SOLUTIONS, COLLOIDS, AND SUSPENSIONS
Property
Solution
Colloid
Suspension
Particle type
atoms, ions, molecules
small particles that
bump into molecules of
the surrounding
material
large clusters of
particles
Particles visible with
microscope
no
no
yes
Particles settle on
standing
no
no
yes
Particles separate by
filtering
no
no
yes
Particles scatter light
no
yes
yes
Examples
salt water
fog, smoke
muddy water
1. Name two properties that make solutions different from colloids. ________________________________
___________________________________________________________________________________________
2. Name three properties that solutions and colloids have in common. ______________________________
___________________________________________________________________________________________
3. What property do colloids and suspensions have in common? ___________________________________
___________________________________________________________________________________________
4. If the label on product X has “Shake before using,” do you think product X is a solution, a colloid,
or a suspension? Why? ______________________________________________________________________
___________________________________________________________________________________________
5. Why can you see the beam of a car’s headlights in the fog, but not in clear air? ____________________
___________________________________________________________________________________________
___________________________________________________________________________________________
Answer Key
Solutions, Colloids, and Suspensions
Enrichment Activity
1. Solutions have
particle type and cannot
scatter light. 2. Both have particles that are not
visible with a microscope, that do not settle on
standing, and that cannot be separated by
3. The particles of both scatter light. 4. suspension,
because the need to shake implies that the particles
will settle on standing 5. Fog, which is a colloid,
has the ability to scatter light, but air is a solution, so
it does not scatter light.
Concepts and Challenges in Physical Science Copyright © by Pearson Learning Inc. All rights reserved.
Suspensions