colloids

Why do solutions not scatter light?

• Because they have large particles

• Because they have small particles that do not reflect light

• Because they are opaque

• Because they absorb all the light

What type of mixture is fog, considering the analogy of car headlights shining through it?

• Solution

• Colloid

• Suspension

• Pure substance

Why do some medicine or drink bottles say, "shake well before use"? What type of mixture are these?

• Solutions that need to be activated

• Colloids that need to be dispersed evenly

• Suspensions that have settled and need to be mixed again

• Pure substances that have separated

After stirring sugar in water, does it dissolve?

• Yes

• No

• N/A because already dissolved

• N/A because it does not dissolve in water

After sitting, does milk separate out over time?

• Yes

• No

• N/A because it does not separate

• N/A because already dissolved

Does flour in water scatter light?

• Yes

• No

• N/A because it does not scatter light

• N/A because it is not a colloid

What type of mixture is sugar in water classified as?

• Solution

• Colloid

• Suspension

• None of the above

What type of mixture is milk classified as?

• Solution

• Colloid

• Suspension

• None of the above

What type of mixture is flour in water classified as?

• Solution

• Colloid

• Suspension

• None of the above

Why do solutions not scatter light?

• Because of the large particle sizes

• Because they do not contain any particles

• Because of the small particle sizes

• Because they absorb all the light