Astronauts

Astronaut spacesuits include an oxygen delivery system because 

• there is less gravity in space. 
• space has nitrogen-rich air. 
• asteroids dissolve in oxygen. 
• space is an airless vacuum. 

Which of the following parts of a spacesuit is essential for the survival of astronauts taking short space walks of less than thirty minutes? 

• Tool belt 
• Oxygen supply
• Freeze-dried food
• Magnetic boots 

A spacesuit includes a helmet, gloves, shoes, and a total body covering. What vital part of the spacesuit that keeps the astronaut alive is missing from this list? 

• A handheld computer 
• A robotic arm 
• An oxygen system 
• A jet pack

What accommodations have been designed to protect astronauts from micrometeoroids hitting their spacesuits? 

• Jet packs 
• Land rovers 
• Removable straps 
• Multilayered spacesuits 

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Astronauts need to exercise while in space because, without gravity, the environment in space - 

• lacks breathable air, including the oxygen humans need. 
• makes astronauts consume more calories during their missions. 
• provides less resistance and weakens muscles and bones. 
• does not allow the human body to retain heat as well as on Earth. 

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There is no air in space. Which of the following accommodations is required for an astronaut to directly communicate with another astronaut in space? 

• Computer 
• Radio 
• Satellite 
• Jet pack 

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Which of the following accommodations is designed to overcome the unique difficulties associated with showering in space? 

• A skid-proof floor mat 
• A drain in the floor of the shower 
• A vacuum system to control water movement 
• A bench inside the shower 

To offset the effects of the low-gravity space environment on the body, astronauts must - 

• exercise regularly. 
• eat high-fat meals. 
• shower twice a day. 
• take naps every day. 

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Astronauts need all of the following to survive in space EXCEPT-

• gravity

• oxygen to breathe

• exercise

• protective clothing

Space stations require an oxygen system because the atmosphere in space -

• is airless

• is poisonous

• smells bad

• is humid