Phy Sci--Chapter 2 Test Review

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties.

Front

What is an indicator of a chemical change?

Back

Indicators of a chemical change include change in odor, formation of a precipitate, and production of gas. A color change is not always an indicator.

Front

How do you calculate volume using density and mass?

Back

Volume = Mass / Density.

Front

What is the density of copper?

Back

The density of copper is 12.5 g/cm³.

Front

What is the melting point?

Back

The melting point is the temperature and pressure at which a solid becomes a liquid.

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 physical change.

Back

Sanding wood is an example of a physical change.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that retain their individual properties and can be separated.

Front

True or False: All mixtures can be separated.

Back

True.

Front

What is a precipitate?

Back

A precipitate is a solid that forms and settles out of a liquid mixture during a chemical reaction.