Matter Properties and Classification

Front

What is a physical property?

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

Front

What is a chemical property?

Back

A characteristic of a substance that can only be observed when it undergoes a chemical change, such as reactivity with acid or flammability.

Front

What is a pure substance?

Back

A material that has a constant composition and consistent properties throughout, such as elements and compounds.

Front

What is a mixture?

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A combination of two or more substances that retain their individual properties and can be separated by physical means.

Front

What is an element?

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A pure substance that cannot be broken down into simpler substances by chemical means, consisting of only one type of atom.

Front

What is a compound?

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A pure substance formed when two or more elements chemically combine in a fixed ratio, such as water (H2O) or carbon dioxide (CO2).

Front

What is the difference between a homogeneous mixture and a heterogeneous mixture?

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A homogeneous mixture has a uniform composition throughout (e.g., saltwater), while a heterogeneous mixture has a non-uniform composition (e.g., salad).

Front

What is density?

Back

The mass of a substance divided by its volume, often expressed in g/cm³ or kg/m³.

Front

What happens to ice when it is heated?

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Ice melts and changes from a solid to a liquid state, demonstrating a physical change.

Front

What is an example of a chemical change?

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Rusting of iron, where iron reacts with oxygen to form iron oxide.