2.4: Mixtures of Matter

Essential Question: How can mixtures be separated into pure substances?

• By chemical reactions

• By physical methods

• By heating only

• By cooling only

Which of the following best describes the characteristics of different types of mixtures?

• Mixtures are composed of two or more substances that are physically combined.

• Mixtures are composed of two or more substances that are chemically combined.

• Mixtures are composed of a single substance.

• Mixtures cannot be separated into their individual components.

How can mixtures be separated into their components?

• By chemical reactions

• By physical methods

• By heating only

• By cooling only

Matter is classified into which of the following categories?

• Solids, Liquids, and Gases

• Elements and Compounds

• Atoms and Molecules

• Mixtures and Solutions

A mixture is defined as:

• a combination of two or more substances that are not chemically bonded

• a substance made of only one type of atom

• a chemical reaction between two elements

• a pure chemical compound

A 'heterogeneous mixture' is:

• a mixture that is uniform throughout

• a mixture that is not uniform throughout

• a pure substance

• a chemical compound

A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture. Which of the following is an example of a homogeneous mixture?

• Sand and water

• Oil and water

• Salt dissolved in water

• Iron filings and sulfur powder

In the context of chemistry, a 'solution' is:

• a mixture where substances are evenly distributed within the major component

• a chemical reaction between two elements

• a solid substance formed from a liquid

• a type of chemical bond

The process of 'filtration' is used to:

• separate solids from liquids

• combine liquids

• evaporate liquids

• condense gases

Distillation is a process used to:

• Separate components of a mixture based on boiling points

• Combine different substances into a single mixture

• Measure the temperature of a liquid

• Change the color of a solution

Tags

NGSS.MS-PS1-4