Matter Review Flashcard - 5th

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

What is density?

Back

Density is the mass of a substance divided by its volume, often expressed in grams per cubic centimeter (g/cm³).

Front

What is a qualitative observation?

Back

An observation that describes the qualities or characteristics of something, such as color or texture.

Front

What is a quantitative observation?

Back

An observation that involves measuring or counting, providing numerical data.

Front

Give an example of a physical change.

Back

Melting ice is an example of a physical change.

Front

Give an example of a chemical change.

Back

Baking a cake is an example of a chemical change.

Front

What happens during a physical change?

Back

The substance may change shape, size, or state, but its chemical identity remains the same.

Front

What happens during a chemical change?

Back

The original substances are transformed into different substances with new properties.

Front

What is a mixture?

Back

A combination of two or more substances that can be separated by physical means.