Chemical Reactions Quiz

What is a chemical reaction?

• A process in which new substances are formed

• A process in which no new substances are formed

• A process in which atoms disappear

• A process in which atoms change shape

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NGSS.MS-PS1-5

What is the Law of Conservation of Matter?

• Matter can be created or destroyed

• The number of atoms before and after a chemical reaction changes

• Atoms can only rearrange themselves in a chemical reaction

• Matter can change its properties in a chemical reaction

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NGSS.MS-PS1-5

What is a physical change?

• A change in the properties of matter with a chemical change

• A change in the properties of matter without any physical change

• A change in state of matter where new substances are formed

• A change in state of matter where no new substance is formed

What do chemical engineers and material scientists study chemical reactions for?

• To create new elements

• To advance space exploration, make medicines, and form new products

• To study the properties of matter

• To understand the behavior of atoms

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What are atoms?

• The smallest particle of matter made up of electrons and neutrons

• The smallest particle of matter made up of protons and neutrons

• The smallest particle of matter made up of protons and electrons

• The smallest particle of matter made up of protons, neutrons, and electrons

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NGSS.MS-PS1-1

How is a physical change different from a chemical change?

• In a physical change, new substances are formed. In a chemical change, new substances are formed

• In a physical change, no new substances are formed. In a chemical change, new substances are formed

• In a physical change, new substances are formed. In a chemical change, no new substances are formed

• In a physical change, no change occurs. In a chemical change, new substances are formed

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How do you know a chemical reaction has happened?

• If a new substance is not formed, it has different properties

• If a new substance is not formed, it has the same properties

• If a new substance is formed, it has the same properties

• If a new substance is formed, it has different properties

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Give an example of a chemical change.

• Freezing water to form ice

• Boiling water to form steam

• Melting ice to form water

• Steel wool burning, which causes the iron to combine with oxygen and form iron oxide

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NGSS.MS-PS1-2

What does a catalyst do in a chemical reaction?

• Slows down the chemical reaction

• Prevents the chemical reaction from happening

• Becomes a part of the new substance formed

• Helps the chemical reaction happen faster, but it does not become a part of the new substance

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Name three different properties you can test before and after a chemical reaction to determine if a new substance was formed.

• Magnetism, flammability, density

• Odor, color, electricity

• Density, odor, color

• Magnetism, flammability, electricity

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NGSS.MS-PS1-2