Compounds and Mixtures

How is a compound different from a mixture?

• Mixtures are created through physical changes; compounds are created through chemical reactions.

• Compounds are created through physical changes; mixtures are created through chemical reactions.

• Mixtures, on average, are heavier than compounds.

• Compounds, on average, are heavier than mixtures.

What occurs during a chemical reaction?

• Atoms of two or more elements are destroyed.

• Atoms of two or more elements oppose one another.

• Atoms of two or more elements bond together.

• Atoms of two or more elements trade protons.

What is true of a mixture?

• It is always thicker than the two chemicals that go into it.

• It retains the properties of the substances that make it up.

• It can never be separated into its constituent substances.

• It is produced through chemical reactions.

Based on the information from the movie, what can you conclude about the most common chemical compound on earth?

• It's oxygen.

• It's hydrogen gas.

• It's carbon dioxide.

• It's water.

What is true of a compound?

• It does not always retain the properties of the substances that make it up.

• It must have water as one of its components.

• It requires heat energy to make.

• It requires electrical energy to make.

Which of the following two ingredients can combine to make a compound?

• Salt and water.

• Hydrogen and oxygen.

• Eggs and butter.

• Sugar and water.

Which of the following is a heterogeneous mixture?

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Which of the following is an example of a chemical element?

• Salt

• Water

• Sugar

• Sodium

Where can you find a common homogenous mixture?

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The elements of a heterogeneous mixture can be distinguished visually. What does this mean?

• That two separate elements have been mixed together.

• That the components of the mixture cannot be separated.

• That you can see the different component parts of the mixture.

• That heterogeneous mixtures combine solids and liquids.