Unit 2 Review--Extra Credit

Front

What is a chemical reaction?

Back

The process by which one or more substances change to produce one or more different substances.

Front

What evidence indicates a chemical reaction has occurred?

Back

Evidence includes the formation of a new substance, color change, gas production, or temperature change.

Front

What happens when sugar is burned?

Back

It gives off an odor, turns brown, and then black, indicating a chemical reaction.

Front

What is an example of a physical change?

Back

A solid block of ice melting into a liquid.

Front

What is the result of mixing baking soda and vinegar?

Back

Bubbles form, indicating a chemical reaction.

Front

Which two elements are in the same group on the periodic table?

Back

Helium (He) and Argon (Ar) are in the same group.

Front

What is a reactant?

Back

A substance that is present at the start of a chemical reaction.

Front

What is a product in a chemical reaction?

Back

A substance that is produced as a result of a chemical reaction.

Front

What does it mean if a solid dissolves in a liquid?

Back

It is a physical change, not necessarily a chemical reaction.

Front

What is the significance of a color change in a reaction?

Back

It can indicate that a chemical reaction has occurred.