Physical Science Ch. 2 Test

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What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include hydrogen, oxygen, and aluminum.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together. Water (H2O) is an example of a compound.

Tags

NGSS.MS-PS1-1

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded. Tap water is an example of a mixture.

Front

What is a chemical change?

Back

A chemical change is a process that involves the transformation of one or more substances into different substances. Evidence of a chemical change includes the formation of a precipitate or gas.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include melting ice or cutting paper.

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What does malleable mean?

Back

Malleable refers to a material's ability to be hammered or pressed into shape without breaking. Metals like gold and aluminum are malleable.

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What does viscous mean?

Back

Viscous describes a thick, sticky consistency of a liquid that resists flow. Honey is an example of a viscous substance.

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What does flammable mean?

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Flammable refers to a substance's ability to catch fire easily. Materials like gasoline and paper are flammable.

Front

What is a precipitate?

Back

A precipitate is a solid that forms and settles out of a liquid mixture during a chemical reaction.

Front

What is the difference between a substance and a mixture?

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A substance has a uniform and definite composition, while a mixture contains two or more substances that retain their individual properties.