Physical and Chemical Changes

Front

What are physical properties?

Back

Physical properties are characteristics of a substance that can be observed or measured without changing its chemical composition, such as color, melting point, and density.

Front

What are chemical properties?

Back

Chemical properties are characteristics of a substance that describe its ability to undergo chemical changes, such as reactivity with acids or flammability.

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, such as melting ice or dissolving sugar in water.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances, such as rusting iron or burning wood.

Front

Can physical changes be reversed?

Back

Many physical changes can be reversed, such as freezing and melting, but some may not be easily reversible.

Front

Can chemical changes be reversed?

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Chemical changes are often not easily reversible, as they involve the formation of new substances.

Front

What happens to the particles during a physical change?

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During a physical change, the fundamental particles remain the same; their arrangement or state may change.

Front

What happens to the particles during a chemical change?

Back

During a chemical change, the fundamental particles break and form new chemical bonds, resulting in new substances.

Front

Give an example of a physical change.

Back

An example of a physical change is the melting of ice into water.

Front

Give an example of a chemical change.

Back

An example of a chemical change is the reaction of vinegar with baking soda, producing carbon dioxide gas.