Pure Substance vs Mixture

What are the two main categories that matter found on Earth can be classified into?

• Solids and Liquids

• Elements and Compounds

• Pure Substances and Mixtures

• Homogeneous and Heterogeneous

Which of the following describes an element?

• A substance that can be easily separated physically.

• A pure substance made of atoms with different numbers of protons.

• A pure substance consisting only of atoms that all have the same numbers of protons.

• A combination of different compounds bonded together.

How can the elements in a compound be separated?

• By physical means

• By a chemical process

• By filtering

• By evaporation

Which of these is an example of a homogeneous mixture?

• Fruit salad

• Oil and vinegar

• Soil

• Gatorade