1. Challenge #2 T. Trimpe 2008 http://sciencespot.net/

2. 1.CO – A dangerous gas 2.H 2 SO 4 – Acid found in car batteries 3.CaCO 3 – Used to write on a blackboard 4.H 2 O 2 – Used to disinfect wounds 5. NaF – Compound found in toothpaste Give the correct name for each compound.

3. 1.CO – A dangerous gas 2.H 2 SO 4 – Acid found in car batteries 3.CaCO 3 – Used to write on a blackboard 4.H 2 O 2 – Used to disinfect wounds 5. NaF – Compound found in toothpaste The answers are … Carbon Monoxide Sulfuric Acid Calcium Carbonate (Chalk) Hydrogen Peroxide Sodium Fluoride Little Johnny was a scientist; A scientist he is no more. For what he thought was H 2 0 Was really H 2 SO 4 !