Exploring Elements, Compounds, and Mixtures

What is an element?

• A substance that can be broken down by chemical means

• A pure substance that cannot be separated into simpler substances by physical or chemical means

• A compound of two or more elements

• A mixture of two or more substances

Which of the following is an example of a compound?

• Iron

• Water

• Gold

• Oxygen

Tags

NGSS.MS-PS1-1

How can mixtures be separated?

• By physical means

• By chemical reactions

• By nuclear reactions

• By breaking chemical bonds

Which method is used to separate a solid from a liquid in a mixture?

• Evaporation

• Filtration

• Sifting

• Distillation

What type of mixture is trail mix?

• Homogeneous

• Heterogeneous

• Compound

• Element

What is the key difference between a compound and a mixture?

• Compounds can be separated by physical means, mixtures cannot

• Compounds are always heterogeneous, mixtures are always homogeneous

• Compounds are physically combined, mixtures are chemically combined

• Compounds are chemically combined, mixtures are physically combined

Which of the following is an element?

• Table sugar

• Neon gas

• Table salt

• Water

Which of the following is a homogeneous mixture?

• Salad

• Trail mix

• Pizza

• Tomato soup

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

• Fruit punch

• Chunky soup

• Salt water

• Air

What does the term 'homogeneous' mean in the context of mixtures?

• The mixture can be separated by chemical means

• The mixture looks the same throughout

• The mixture contains only one type of element

• The mixture is unevenly distributed