The 100 Most Wanted Questions for Elementary School StudentsI

Author: Bai Hongjun / Country: Mainland China
Publisher:
Publish Date: 2006-07-01
Features: Since Yang Liwei Uncle went into space, becoming an excellent astronaut has become a dream for many children. However, you should know that being an astronaut isn’t easy! First, eating is a big problem. Riding in a spaceship isn’t as stable and comfortable as taking a boat or an airplane, because when floating in space, there’s no gravity on Earth. Astronauts and everything on the ship are in a weightless state. So, plates, cups, and even people will float away. It sounds fun, but in reality, it’s very troublesome! If astronauts don’t find a way to fix themselves and their belongings, they can’t work or live normally. All the food will float away, so how do astronauts eat? To solve this problem, scientists used special methods to create "space food."
What’s "space food"? It’s high-nutrient foods like beef, vegetables, and fruits that are dried, compressed, and then packed into plastic bags. It’s a bit like the vegetable and seasoning packets in instant noodles. When astronauts need to eat, they first add water to the plastic bag, then "eat" it just like how we use a straw to drink a drink. Now you know, being an astronaut isn’t that easy, right!
Tip: Why do lunar explorers wear spacesuits? Lunar explorers must wear spacesuits. Because under the sun’s, the surface temperature of the moon exceeds 200 degrees Celsius! On Earth, water boils at 100 degrees Celsius, and at 200 degrees, wouldn’t people be roasted dry? But at night, the temperature on the moon drops sharply, becoming freezing and freezing, which can freeze people solid. Under such harsh climate conditions, thankfully, our astronauts wear specially designed spacesuits. Otherwise, it would be a disaster!
Why can spacesuits keep warm? Because they are filled with water, and the water temperature is constant. The biggest advantage of spacesuits lies in using circulating water to regulate temperature, so astronauts can always feel like springtime—warm and comfortable—no matter when or where they are. This way, they can move normally even under the moon’s harsh conditions! P6-7