Formation of a New Substance

Bubbles and fizzing can be seen when baking soda is combined with vinegar. This is evidence of what?

• A gas is formed

• A precipitate is formed

• Baking Soda dissolves

This term is another term for Chemical Change; it involves combining different substances and producing a new substance.

• Fireworks

• Physical Change

• Chemical Reaction

• Energy

A granular substance is added to a liquid. Which of the following would provide evidence of a chemical change?

• Liquid gives off heat

• Volume increases

• The granules dissolve

• Granules get smaller

Which answer choice can be released during a chemical change?

• Fireworks

• Chemical Change

• Chemical Reaction

• Energy

Which of the following would indicate that a new substance has formed?

• Temperature decreases

• Volume increases

• Mass increases

• One substance dissolves

Which of the following happens when elements bond together or when bonds are broken and form a new substance?

• Fireworks

• Chemical Change

• Energy

2 clear liquids are combined, and after a few minutes there is a white powder settling at the bottom. What is produced?

• Substances combined to produce a precipitate.

• Substances were stored too long and are no longer good to produce.

• Pure substances before being mixed.

Which of the following would indicate the formation of a new substance?

• Liquid turns into a solid

• Bubbles and fizzing

• Metal melts

• A solid dissolves

Which of the following characteristics is shared by all chemical reactions?

• A precipitate

• Color Change

• Heat energy release

• Form new substances

Which of the following provides evidence of a chemical change taking place?

• Water, boiling, evaporates

• Sugar dissolves when added to tea

• 2 substances mixed form a solid

• A piece of paper is cut in half