KIDS QUIZ
SPACE EXPLORATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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There is not much else to do, and exercising passes the time
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It prevents their bones and muscles from weakening.
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Astronauts need to stay in good shape.
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It helps them to sleep better at night.
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Detailed explanation-1: -In the microgravity environment aboard the orbiting International Space Station, bones and muscles don’t have to support the body’s mass (weight on Earth). Without Earth-like exercise, astronauts would experience bone and muscle loss or atrophy during their stays in space.
Detailed explanation-2: -Bone loss occurs in the weightless environment of space because bones no longer have to support the body against gravity. On Earth, gravity applies a constant mechanical load to the skeletal system, that causes healthy bones to maintain a certain density so that they are able to support the body.
Detailed explanation-3: -Because astronauts work in a weightless environment, very little muscle contraction is needed to support their bodies or move around. Without regular use and exercise our muscles weaken and deteriorate. It’s a process called atrophy.