Exploring Mixtures in Grade 6

What are the two main types of mixtures?

• Homogeneous mixtures and heterogeneous mixtures

• Simple and complex mixtures

• Organic and inorganic mixtures

• Liquid and solid mixtures

Define a homogeneous mixture with an example.

• Salt water

• Air and nitrogen

• Sand and gravel

• Oil and water

Define a heterogeneous mixture with an example.

• Air is an example of a heterogeneous mixture.

• A solution of salt in water is a heterogeneous mixture.

• A salad is an example of a heterogeneous mixture.

• A smoothie is an example of a heterogeneous mixture.

What is the process of separating mixtures called?

• Filtering elements

• Mixing compounds

• Combining substances

• Separation of mixtures

Name one method used to separate solid from liquid in a mixture.

• Filtration

• Evaporation

• Centrifugation

• Distillation

What is filtration?

• Filtration is the process of mixing solids with liquids.

• Filtration is the process of separating solids from fluids using a filter.

• Filtration is a method of heating liquids to separate components.

• Filtration involves dissolving solids in a solvent.

How can you separate a mixture of sand and salt?

• Add oil to the mixture to separate the components.

• Mix sand and salt together and use a magnet to separate them.

• Heat the mixture until the sand melts and separates from the salt.

• Use water to dissolve the salt, then filter to separate sand and evaporate to recover salt.

What is the difference between a solution and a mixture?

• A solution can only contain one substance, while a mixture can contain multiple substances.

• A solution is a type of compound, while a mixture is a type of element.

• A solution is always a solid, while a mixture is always a liquid.

• A solution is a homogeneous mixture, while a mixture can be either homogeneous or heterogeneous.

Give an example of a homogeneous mixture found in the kitchen.

• Sand

• Sugar water

• Saltwater

• Vegetable oil

Give an example of a heterogeneous mixture found in nature.

• Air

• Fruit salad

• Salad

• Sand