What I've Learned In 7th Grade Science So Far....2024

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What is a chemical property?

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A characteristic of a substance that can only be observed during a chemical reaction, such as the ability to burn.

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What is the Metric System?

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A standard measurement system based on powers of 10, used for scientific measurements.

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What are metals?

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Elements that are shiny, good conductors of heat and electricity, and are malleable and ductile.

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What is an atomic number?

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The number of protons in the nucleus of an atom, which determines the element's identity.

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What is a group in the periodic table?

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A column in the periodic table where elements have similar chemical properties.

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What is a physical property?

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

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What is density?

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The mass of a substance divided by its volume, often used to identify substances.

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What are nonmetals?

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Elements that are generally poor conductors of heat and electricity and are not malleable or ductile.

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What is a chemical change?

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A process where one or more substances are transformed into different substances, such as rusting or burning.

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What is the difference between a mixture and a compound?

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A mixture is a combination of two or more substances that retain their individual properties, while a compound is a substance formed when two or more elements chemically bond.