Mixtures and Substances

Which of the following is a pure substance?

• Saltwater

• Air

• Gold

• Salad

What type of mixture is a solution?

• Heterogeneous

• Homogeneous

• Colloid

• Suspension

Which of the following is an example of a heterogeneous mixture?

• Vinegar

• Milk

• Sand and water

• Saltwater

What is the main characteristic of a colloid?

• Particles settle out over time

• Particles are dissolved completely

• Particles are evenly dispersed but do not settle

• Particles are large and visible

Which piece of equipment is used to separate a mixture by spinning it rapidly?

• Centrifuge

• Filter paper

• Evaporating dish

• Bunsen burner

Which of the following is a method to separate a solid from a liquid in a heterogeneous mixture?

• Filtration

• Distillation

• Chromatography

• Evaporation

What type of mixture is milk?

• Solution

• Suspension

• Colloid

• Pure substance

Which of the following is a homogeneous mixture?

• Salad

• Saltwater

• Sand and iron filings

• Oil and water

Which separation technique is used to separate components of a mixture based on boiling points?

• Filtration

• Distillation

• Chromatography

• Decantation

What is a suspension?

• A mixture where particles are dissolved

• A mixture where particles are evenly dispersed but do not settle

• A mixture where particles are large and settle out over time

• A pure substance