Year 7 Stile Separation techniques

Which of the following best describe as pure substances?

• Is a mixture of two or more pure substances

• Salt water is an example of pure substances

• Can be either an element or a compound

• Pure substances can only be element

Which of the following best describe as a mixture?

• Can only be a element

• an be either an element or a compound

• A combination of two or more pure substances that can be physically separated

What is an example of homogenous solution?

• Pepper and salt

• Sand and water

• Milk and water

• Vinegar and water

Identify if this picture is one of the following?

• Homogeneous

• Heterogeneous

Identify if this picture is one of the following?

• Heterogeneous

• Homogeneous

Which of the the following best describes as a solution?

• A solution is made up of just elements

• A solution is a homogeneous mixture in which one or more substances (the solutes) are dissolved in another substance (the solvent)

• A solution is a heterogeneous mixture in which one or more substances (the solutes) are dissolved in another substance (the solvent)

• A solution is just made up of a compound

Only elements are pure substances?

• True

• False

Mixtures can be separated into their different pure substance components?

• True

• False

Which of the following best describe as filtration?

• Filtration can be used to separate insoluble solids from a liquid

• Filtration can be used to separate solids from solids

• Filtration can be used to separate soluble solids from a liquid

• Filtration can be used to separate liquid from a liquid

Which of the following best describes how filtration works?

• A mixture of sand and water is poured through filter paper in a funnel, the sand particles remain as a solid residue in the filter paper, while the water is collected in the beaker below as a liquid filtrate

• A mixture of cordial and water is poured through filter paper in a funnel, the cordial particles remain as a liquid residue in the filter paper, while the water is collected in the beaker below as a liquid filtrate

• It recovers the solute from the solution by evaporating away the solvent, but not the solute

• If sawdust and sand are stirred into water, the sawdust floats and the sand sinks