Earth Science Quiz: Elements, Photosynthesis, and Respiratory System
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Questions and Answers

Which of the following is a common element in the Earth's crust?

  • Gold
  • Silver
  • Helium
  • Oxygen (correct)
  • What is the process by which plants use sunlight to synthesize foods with the help of chlorophyll?

  • Oxidation
  • Respiration
  • Fermentation
  • Photosynthesis (correct)
  • Which of the following is a primary function of the human respiratory system?

  • Nutrient absorption
  • Waste elimination
  • Gas exchange (correct)
  • Hormone production
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