Chemistry review

Front

What is a physical property?

Back

A characteristic of a substance that can be observed without changing its chemical composition, such as color, melting point, or freezing point.

Front

What is a chemical property?

Back

A characteristic of a substance that describes its ability to undergo a specific chemical change, such as reactivity with oxygen.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition, such as melting ice.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances, such as rust forming on iron.

Tags

NGSS.MS-PS1-2

Front

What is an exothermic reaction?

Back

A chemical reaction that releases energy in the form of heat or light.

Tags

NGSS.HS-PS1-4

Front

What is an endothermic reaction?

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A chemical reaction that absorbs energy from its surroundings.

Tags

NGSS.HS-PS1-4

Front

What are signs of a chemical change?

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Signs include color change, gas production, temperature change, and the formation of a precipitate.

Tags

NGSS.MS-PS1-2

Front

What is the law of conservation of mass?

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In a chemical reaction, mass is neither created nor destroyed; it is conserved.

Tags

NGSS.MS-PS1-5

Front

What is the difference between a physical change and a chemical change?

Back

A physical change does not alter the chemical composition of a substance, while a chemical change does.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is an example of a physical property?

Back

Density, color, boiling point, and solubility are examples of physical properties.