Sally Ride And Shaughnessy's The Mystery Of Mars

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The authors, Sally Ride & Tam O'Shaughnessy, wrote an expository text , The Mystery of Mars. In the text we learned about the atmosphere’s thin air, the martian soil, and the landing of the spacecrafts. The first spacecraft that landed on the martian soil was Viking I and Viking II. They landed in 1976. It had two arms, to scoop samples to detect the soil for living things like bacteria. When they needed to know more information, scientists made a new high-tech robot named Pathfinder. It landed 21 years later, in 1997. Sojourner landed in 1997 and was the size of a small dog. It’s wheels grinded into the martian soil to detect any living thing of life on Mars. It had cameras for the eyes, to look at it’s surroundings. It was about 2 …show more content…

It landed where scientist suspected, was covered with water long ago. Spirit and Opportunity has very large solar panels to be powered and like sojourner it had eyes that were the cameras to see around the sight of mars. The rover was the size of a small dune buggie. The picture that came back to earth detected there once was flowing water. it traveled different parts of Mars it traveled miles across the surface. The Martin rocks were analyzed to detect any bacteria or any living organisms in the soil and on it from long ago in the past and any kind of hope on living on mars. Scientists suspected the harsh weather can destroy chemicals in the martians soil. Many of the rocks here were deposited by floods billions of years ago. The air in Mars is really thin and if there was any liquid on mars it would all boil through. There is low oxygen and it is impossible to breath. The martian clouds contain crystals of water ice. The air is so thin That water droplets cannot form in Mars Atmosphere. Mount Everest is the tallest mountain on Earth, Scientist measured if you times Mount Everest three times it would equal how the air is on Mars. When the air is that thin water can boil at low temperatures and near its freezing

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