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uttam_chandra
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There was a boy who really wanted to open his own business. He loved watching shows on TV about people who invented great things and helped other people love their inventions, too. He tried to learn about how people started their own businesses and how they got their great ideas, but a lot of it was too hard for him to understand yet. His mom suggested that he look around the community for a business leader who might be able to help him understand, so that he could start his own business one day. One day, he and his mom were out getting ice cream, and the shop owner, Mr. Warner, was the one serving them. Astronauts put on their spacesuits several hours before a spacewalk. The suits are pressurized. This means that the suits are filled with oxygen. Once in their suits, astronauts breathe pure oxygen for a few hours. Breathing only oxygen gets rid of all the nitrogen in an astronaut's body. If they didn't get rid of the nitrogen, the astronauts might get gas bubbles in their body when they walked in space. These gas bubbles can cause astronauts to feel pain in their shoulders, elbows, wrists and knees. This pain is called getting "the bends" because it affects the places where the body bends. Scuba divers can also get "the bends." One way astronauts train for spacewalks is by going for a swim. Floating in space is a lot like floating in water. Astronauts practice spacewalks underwater in a large swimming pool. Astronauts train seven hours in the pool for every one hour they will spend on a spacewalk. Another way astronauts practice for a spacewalk is by using virtual reality. This is sort of like playing a video game. Astronauts wear a helmet with a video screen inside. They also wear swimming costumes for their practice.