Classification of Matter

Front

How can you tell a mixture is heterogeneous from a photo?

Back

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

Front

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

Back

pure substances

Front

What are the two types of mixtures?

Back

heterogeneous and homogeneous

Front

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

Back

homogeneous mixture

Front

Which type of matter has a specific composition ("recipe") and cannot be physically separated? Options: pure substances, homogeneous mixtures, heterogeneous mixtures, colloids

Back

pure substances

Front

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

Back

mixtures

Front

Example of a NONREVERSIBLE physical change:

• cutting your hair
• rust forms on an old car
• melting ice
• baking cookies

Back

cutting your hair

Front

Example of a REVERSIBLE physical change:
- crushing a rock
- burning paper
- freezing water
- baking cookies

Back

freezing water

Front

What is salt water an example of?

Back

homogeneous mixture

Front

What physical properties are mixtures classified by?

Back

particle size and appearance