7.6A Chemical & Physical Change Retake Assessment

Front

What is a chemical change?

Back

A chemical change is a process where one or more substances are transformed into new substances with different properties.

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.

Front

Give an example of a chemical change.

Back

Examples include wood burning, cake baking, and firecracker exploding.

Front

Give an example of a physical change.

Back

Examples include melting ice, dissolving sugar in water, and grinding chalk.

Front

What is a chemical property?

Back

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

Front

What is a physical property?

Back

A physical property is a characteristic that can be observed or measured without changing the substance's identity, such as color, melting point, and density.

Front

What evidence indicates a physical change?

Back

Physical changes are often reversible, such as melting and freezing.

Front

What evidence indicates a chemical change?

Back

Chemical changes often produce new substances and are usually not reversible, such as burning wood.

Front

What happens to the properties of a substance during a chemical change?

Back

The properties of the original substance change, and new properties emerge in the new substances formed.

Front

What happens to the properties of a substance during a physical change?

Back

The properties may change temporarily, but the substance remains the same chemically.