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  4. What is the largest spider in the world by leg span?

    What is the largest spider in the world by leg span?

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  5. What is the most common metal found on Earth?

    What is the most common metal found on Earth?

    11
  6. Which planet is the hottest in our solar system?

    Which planet is the hottest in our solar system?

    11
  7. What is the largest organ in the human body?

    What is the largest organ in the human body?

    11
  8. What unit is used to measure the intensity of light?

    What unit is used to measure the intensity of light?

    12
  9. What branch of zoology focuses on the study of birds?

    What branch of zoology focuses on the study of birds?

    11
  13. Who discovered the first exoplanet orbiting a sun-like star?

    Who discovered the first exoplanet orbiting a sun-like star?

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  17. What is the chemical formula for nitrous acid?

    What is the chemical formula for nitrous acid?

    3
  22. What is the chemical formula for hypochlorous acid?

    What is the chemical formula for hypochlorous acid?

    6