Differentiating Heterogeneous and Homogeneous Mixtures

What is the main difference between a mixture and a compound?

• Compounds can be separated by physical means, mixtures cannot.

• Compounds are physically combined, mixtures are not.

• Mixtures can be separated by physical means, compounds cannot.

• Mixtures are chemically combined, compounds are not.

In the example of Blackbeard's treasure, what method is used to separate gold from sand?

• Evaporation

• Sieving

• Distillation

• Filtration

What is a key characteristic of a heterogeneous mixture?

• Consistent properties

• Uniform composition

• Variable composition

• Cannot be separated by physical means

Why does sand sink to the bottom in a mixture of sand and water?

• Water is more dense than sand

• Sand is more dense than water

• Water is less dense than sand

• Sand is less dense than water

What is the main characteristic of a homogeneous mixture?

• Variable composition

• Uniform composition

• Cannot be separated by physical means

• Inconsistent properties

In the example of seawater, what is the solute?

• Neither water nor salt

• Both water and salt

• Salt

• Water

What separation technique can be used to turn seawater into fresh water?

• Distillation

• Evaporation

• Sieving

• Filtration

Tags

NGSS.MS-PS1-4

What is a solution?

• A compound with uniform composition

• A heterogeneous mixture with large particles

• A homogeneous mixture with extremely small dissolved particles

• A mixture that cannot be separated by physical means

What is the role of a solvent in a solution?

• It dissolves the solute to form a solution

• It is the substance that dissolves in the solute

• It is present in lower concentrations

• It is always a solid

Which of the following is a similarity between homogeneous and heterogeneous mixtures?

• Both have uniform composition

• Both can be separated by chemical means

• Both consist of two or more substances physically combined

• Both have variable composition