Formation of a New Substance

Front

What happens to sugar when it is heated over a flame?

Back

The sugar turns black, indicating a chemical change has occurred.

Front

What is a chemical change?

Back

A process where a new substance is formed, often accompanied by changes in color, temperature, or state.

Front

What is a physical change?

Back

A change that does not create a new substance, such as melting or dissolving.

Front

What evidence shows that a chemical change has taken place?

Back

Formation of a new substance, such as a precipitate when two liquids are mixed.

Front

What happens to milk when it goes sour?

Back

It undergoes a chemical change.

Front

What is an example of a physical change?

Back

Cutting a piece of paper into many small pieces.

Front

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

Back

A chemical change results in a new substance, while a physical change does not.

Front

What is an example of a chemical change in cooking?

Back

Baking a cake, where ingredients react to form a new substance.

Front

What does it mean when a substance changes color?

Back

It may indicate a chemical change is occurring.

Front

What is a precipitate?

Back

A solid that forms from a liquid mixture during a chemical reaction.