Element Compound Mixture Test

The circles and dots in the boxes here represent atoms of two different elements. Atoms touching each other are considered bonded to each other. Which box contains a mixture?

• Box A

• Box B

• Box C

• Box D

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NGSS.MS-PS1-1

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NGSS.MS-PS1-1

Which of the following illustrations represents a pure substance?

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• A pure substance consists of only one type of element.

• A pure substance has a definite chemical composition.

• A pure substance cannot be broken down into simpler substances.

• A pure substance is normally found as a solid at room temperature.

• 1

• 3

• 6

• 7

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NGSS.MS-PS1-1

Andy wants to study a compound in his science class. Which of these is a compound?

• salt

• iron

• helium

• hydrogen

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NGSS.MS-PS1-1

Which of the following is formed when two elements combine chemically?

• an atom

• a compound

• an electron

• a mixture

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NGSS.MS-PS1-1

NGSS.MS-PS1-5

Sugar is composed of carbon, hydrogen, and oxygen. Sugar is an example of which of the following?

• an atom

• a compound

• an electron

• a mixture

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NGSS.MS-PS1-1

Which of the following is an example of a container that is filled with a pure substance rather than with a mixture?

• a tire filled with air

• a jar filled with salt water

• a balloon filled with helium

• a glass filled with chocolate milk

In the following diagrams, the spheres represent particles. Different shadings represent different particles. Which of the following contains only one pure substance?

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Tags

NGSS.MS-PS1-1