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    1. What is an exothermic reaction?

    2. What is conservation of mass?

    3. What are examples of fossil fuels?

    4. What is a chemical reaction?

    5. 2H2 +O2= ?

    6. What is oxidation?

    7. What do all chemicals reactions involve?

    8. What can cause climate change?

    9. What can we use to represent an equation?

    10. What are fossil fuels?