Pure Substance and Mixtures

How can you distinguish between pure substances and mixtures?

• 1. Pure substances can be separated into their parts while mixtures cannot be separated. 

• 1. Pure substances are categorized as homogeneous or heterogeneous substances while mixtures are categorized as compounds or elements. 

• Pure substances cannot be separated into their parts while mixtures can be separated.

• 1. Pure substances are categorized as homogeneous or element substances while mixtures are categorized as compounds or heterogeneous. 

A student made trail mix to take on a hiking trip. They decided to add peanuts, chocolate pieces, cereal, and popcorn to it. Which of the following is true about the trail mix?  

• The trail mix is an example of a pure substance.

• The trail mix is an example of a heterogeneous mixture. 

• 1. The trail mix is an example of a homogeneous mixture.  

• 1. The trail mix is an example of a solution.  

Which of the following examples is NOT a pure substance? 

• Hydrogen

• Oxygen

• Water

• Lemonade

What is the difference between a homogeneous and a heterogeneous mixture?

• A homogeneous mixture is where the components are uniformly distributed and the same throughout, while a heterogeneous mixture is where the components are not uniformly distributed or mixed together.

• A homogeneous mixture is a mixture of different substances, while a heterogeneous mixture is a pure substance

• A homogeneous and a heterogeneous mixture are the same thing

• A homogeneous mixture is made up of two or more different types of atoms, while a heterogeneous mixture is made up of only one type of atom