Exploring Mixtures vs. Pure Substances

What is matter?

• Anything that has mass but no volume

• Anything that takes up space and has volume

• Only living things

• Only non-living things

Which of the following is a pure substance?

• Shampoo

• Soil

• Salt (NaCl)

• Trail mix

What is an element?

• A pure substance found on the periodic table

• A mechanical mixture

• A mixture of two or more substances

• A compound of two or more elements

Which of the following is a compound?

• Gold (Au)

• Oxygen (O2)

• Water (H2O)

• Iron (Fe)

Tags

NGSS.MS-PS1-1

What is a mechanical mixture?

• A mixture where you can see all the different parts

• A pure substance made of one element

• A chemical combination of two or more elements

• A mixture where you cannot see the different parts

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

• Shampoo

• Lucky Charms cereal

• Peanut butter

• Salt water

What is a solution?

• A mixture where you can see all the different parts

• A pure substance made of one element

• A mixture where you cannot see the different parts

• A mechanical mixture

Which of the following is an example of a solution?

• Trail mix

• Shampoo

• Coconut mixture

• Lucky Charms cereal

What is the main difference between a mechanical mixture and a solution?

• In solutions, you can see all the different parts

• In mechanical mixtures, you can see all the different parts

• Solutions are pure substances

• Mechanical mixtures are pure substances

What are the two main categories of matter discussed in the lesson?

• Elements and compounds

• Solids and liquids

• Pure substances and mixtures

• Mechanical mixtures and solutions