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6. What is the equation for combustion?

  • Hydrogen + Oxygen - Carbon Dioxide (+energy)
  • Hydrogen + Oxygen - Carbon Dioxide + Water (+energy)
  • Oxygen + Hydrogen - Carbon Dioxide + Water (+energy)
  • Hydrogen + Oxygen + Water (+energy)

7. What does a renewable source of energy mean?

  • Something that can be reused!
  • Something that is renewable