Pure substances, Mixtures and Separation Techniques

True or false: Magnets can be used to separate iron filings from sand

• True

• False

True or false: Sieving can be used to separate a mixture with two solid components of different sizes

• True

• False

The air around us is an example of a mixture

• True

• False

When sugar dissolves in a glass of warm water, the sugar is the_________

• Solute

• Solvent

What separation technique did you use to separate the iron filings?

• Sieving

• Filtration

• Magnetic separation

Which of the following substances are Insoluble?

• Salt

• Sugar

• Sand

• Coffee

The image shows a mixture of concrete nails and saw dusts. What technique is best to use to separate the nails from the saw dusts?

• sieving

• chromatography

• decantation

• magnetic separation

How could you seperate salt that has dissolved in water?

• FIltration

• Evaporation

• Sieving

• Magnetic separation

When foods are dissolved in our stomach through acids. Are the stomach acids the solvent or solute?

• Solvent

• Solute

Which of the following is NOT a mixture?

• milk

• lemonade

• vegetable salad

• carbon