12. describe the results of a chemical change. list four
indicators of chemical change.

1. Color Change

2. Change in temperature

3. Noticiable Odor

4. Formation of bubbles

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.