SCI 101 DrG week 4 Chemical Reactions

Front

What is a sign that a chemical change has occurred?

Back

Signs of a chemical change include unexpected color change, temperature change, formation of a precipitate, and gas production.

Front

Which of these is NOT a sign of a chemical change?

Back

A loss of transparency is NOT a sign of a chemical change.

Front

What does the Law of Conservation of Mass state?

Back

The Law of Conservation of Mass states that matter cannot be created or destroyed, and the mass of the products must equal the mass of the reactants.

Front

What happens to bonds during a chemical reaction?

Back

In a chemical reaction, bonds are broken and new bonds are formed, creating new substances.

Front

What are the substances called that undergo a chemical change?

Back

The substances that undergo a chemical change are called reactants.

Front

What are the new substances formed in a chemical reaction called?

Back

The new substances formed in a chemical reaction are called products.

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

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

Front

What is a chemical change?

Back

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

Front

Give an example of a chemical change.

Back

An example of a chemical change is rust forming on iron.