Classification of Matter

The photo shows a heterogeneous mixture. How can you tell it is a heterogeneous mixture from the photo?

• You cannot see the different parts that make up the mixture.

• You can see the different parts that make up the mixture.

• It is being filtered.

• The different parts are chemically combined.

What are compounds, molecules, and elements all examples of?

• pure substances

• homogeneous mixtures

• heterogeneous mixtures

What are the two types of mixtures?

• pure substances and compounds

• homogeneous and molecules

• heterogeneous and elements

• heterogeneous and homogeneous

Kool-aid powder and sugar are dissolved in water to make a sweet treat. Which type of mixture is this?

• homogeneous mixture

• heterogeneous mixture

• compound

• molecule

Which type of matter has a specific composition ("recipe") and cannot be physically separated?

• pure substances

• homogeneous mixtures

• heterogeneous mixtures

• colloids

Which type of matter has a variable (able to change) composition ("recipe") and can be physically separated?

• pure substances

• compounds

• molecules

• mixtures

Which of the following is an example of a NONREVERSIBLE physical change?

• cutting your hair

• rust forms on an old car

• melting ice

• baking cookies

Which of the following is an example of a REVERSIBLE physical change?

• crushing a rock

• burning paper

• freezing water

• baking cookies

Tags

NGSS.MS-PS1-4

What is potassium chloride (KCl) an example of?

• element

• molecule

• compound

Tags

NGSS.MS-PS1-1

What is salt water an example of?

• homogeneous mixture

• compound

• molecule

• heterogeneous mixture