Classifying Matter Review

Which of the following is a characteristic of a compound?

• It can be separated into its components by physical means.

• It is made up of only one type of atom.

• It has a fixed composition and properties.

• It is a mixture of two or more substances.

Tags

TEKS.SCI.8.6A

DOK Level 1: Recall

Identify the homogeneous mixture from the following options:

• Sand and water

• Salt dissolved in water

• Oil and water

• Iron filings and sulfur

Tags

TEKS.SCI.8.6A

DOK Level 1: Recall

Explain why salt water is considered a homogeneous mixture.

• Because it contains only one type of atom.

• Because the salt and water are uniformly distributed.

• Because it can be easily & quickly separated by physical means.

• Because it has a fixed composition and cannot be physically separated.

Tags

TEKS.SCI.8.6A

DOK Level 2: Skill/Concept

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

• Air

• Vinegar

• Salad

• Sugar water

Tags

TEKS.SCI.8.6A

DOK Level 1: Recall

• Element

• Compound

• Homogeneous mixture

• Heterogeneous mixture

Tags

TEKS.SCI.8.6A

DOK Level 2: Skill/Concept

Analyze the following scenario: You have a sample of muddy water. How would you classify this sample and why?

• Element, because it contains only one type of substance.

• Compound, because it has a fixed composition.

• Homogeneous mixture, because the components are uniformly distributed.

• Heterogeneous mixture, because the components are not uniformly distributed.

Tags

TEKS.SCI.8.6A

DOK Level 3: Strategic Thinking

Evaluate the following statement: "Air is a homogeneous mixture." Justify your answer.

• True, because the components of air are uniformly distributed.

• True, because air is made up of only one type of molecule.

• False, because air is a compound with a fixed composition.

• False, because the components of air are not uniformly distributed.

Tags

TEKS.SCI.8.6A

DOK Level 3: Strategic Thinking

Which models show a homogeneous mixture?

• 6

• 1, 3, 4, and 5

• 1 and 4

• 5 and 6

Which of the models show elements only?

• 5

• 6

• 5 and 6

• 4 and 5

Tags

NGSS.MS-PS1-1

Which models show a heterogeneous mixture?

• 1 and 4

• 2 and 3

• 1, 4, and 6

• 2, 3, and 6