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Multiple Choice

Which of the following best describes a property of a mixture?

• It is made up of only one type of atom.

• Its components can be separated by physical means.

• It has a fixed composition.

• It cannot be separated into simpler substances.

Open Ended

Why is it important to understand what makes up matter in our daily lives?

Multiple Choice

Which of the following best describes an element?

• A substance that can be broken down into simpler substances by chemical means

• A substance that cannot be broken down into any other substances by chemical or physical means

• A mixture of two or more substances

• A group of atoms held together by chemical bonds

Multiple Select

Which of the following are molecules?

• Carbon dioxide

• Gold

• Water

• Ammonia

Open Ended

Compare the definitions of an element and a molecule. How are they different?

Open Ended

What information does a chemical formula provide about a compound?

Multiple Choice

Which of the following best describes a mixture?

• A combination of two or more substances that are chemically bonded

• A combination of two or more substances that are not chemically bonded

• A single pure substance

• A substance that cannot be separated

Multiple Select

Which of the following are examples of heterogeneous mixtures?

• Guacamole

• Ketchup

• Salt water

• Air

Multiple Choice

Which method would you use to separate iron filings from sand?

• Filtration

• Evaporation

• Magnetic attraction

• Distillation

Open Ended

Explain how you could separate the avocado and tomato in guacamole based on what you have learned.

Multiple Choice

What happens when a salt water solution is left in the open air?

• The water evaporates, leaving salt behind

• The salt evaporates, leaving water behind

• Both salt and water evaporate

• Nothing happens

Multiple Choice

Which of the following best describes the process of distillation as shown in the diagram?

• Separating liquids by boiling and condensing one of them

• Mixing two liquids to form a solution

• Filtering solids from liquids

• Evaporating all liquids to dryness

Open Ended

Explain how the classification of matter into elements, compounds, and mixtures helps scientists understand the properties and behavior of different substances.

Open Ended

How would you describe what makes up matter in your own words?

Multiple Choice

What are the main properties that distinguish a mixture from a pure substance?

• A mixture can be separated by physical means, while a pure substance cannot.

• A mixture has a fixed composition, while a pure substance does not.

• A mixture is always a liquid, while a pure substance is always a solid.

• A mixture contains only one type of atom, while a pure substance contains multiple types.