Wednesday, August 19, 2026

These are the 10 questions BrainRank served to the whole world on Wednesday, August 19, 2026 — now over, with every answer revealed and explained. Reading time only; the score no longer counts.

1. science

   At standard atmospheric pressure, at what temperature does pure water freeze?

   • 32 degrees Celsius
   • 0 degrees Celsius
   • -10 degrees Celsius
   • 100 degrees Celsius

   Answer: 0 degrees Celsius

   Pure water freezes at 0 degrees Celsius at standard pressure.

2. geography

   The Great Barrier Reef lies off the coast of which country?

   • Indonesia
   • Philippines
   • Australia
   • New Zealand

   Answer: Australia

   The Great Barrier Reef is off the northeastern coast of Australia.

3. science

   At sea level, at what temperature does pure water boil?

   • 50 degrees Celsius
   • 90 degrees Celsius
   • 212 degrees Celsius
   • 100 degrees Celsius

   Answer: 100 degrees Celsius

   Water boils at 100 degrees Celsius at sea-level atmospheric pressure.

4. nature

   Which is the largest living species of bird?

   • Eagle
   • Albatross
   • Ostrich
   • Emu

   Answer: Ostrich

   The ostrich is the largest and heaviest living bird.

5. geography

   The country of Egypt is located on which two continents?

   • Africa and Asia
   • Africa and Europe
   • Asia and Europe
   • Africa and South America

   Answer: Africa and Asia

   Egypt spans Africa and the Sinai Peninsula, which is in Asia.

6. science

   Which chemical symbol represents the element helium?

   • Hl
   • Hm
   • Ho
   • He

   Answer: He

   He is the chemical symbol for helium.

7. history

   The Great Sphinx, a statue with a lion's body and human head, sits near which ancient site?

   • Stonehenge
   • The Parthenon
   • The Acropolis
   • The Pyramids of Giza

   Answer: The Pyramids of Giza

   The Great Sphinx sits near the Pyramids of Giza in Egypt.

8. everyday-science

   Which organ in the human body pumps blood through the circulatory system?

   • The liver
   • The heart
   • The stomach
   • The brain

   Answer: The heart

   The heart is a muscular pump that circulates blood around the body.

9. science

   Which gas makes up the largest proportion of Earth's atmosphere?

   • Oxygen
   • Nitrogen
   • Carbon dioxide
   • Hydrogen

   Answer: Nitrogen

   Nitrogen makes up about 78 percent of Earth's atmosphere by volume.

10. science

    Which chemical symbol represents the element sodium?

    • Na
    • So
    • Sd
    • Nm

    Answer: Na

    Na (from Latin 'natrium') is the chemical symbol for sodium.