Did You Know That (About Nature) - 6

  • Rubber bands last longer when kept refrigerated.
  • Sea water is approximately 3.5% salt.
  • Sound travels 10 times faster through granite than air.
  • Sound travels 15 times faster through steel than air.
  • Sound travels 4.3 times faster through water than in air.
  • Sponges hold more cold water than hot.
  • Sun light can penetrate clean ocean water up to a depth of 73m (240 feet).
  • The Atlantic Ocean is saltier than the Pacific.
  • The center of the Sun is approximately 15 million C (27 million F).
  • The diameter of Earth is 12,756 km (7,926 miles).

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