Spacewalk: Exploring the Depths of Space

The video explains spacewalks, also known as EVAs, which are activities astronauts perform outside spacecraft. It covers the history of spacewalks, including Alexey Leonov's first spacewalk and Anatoly Solovyev's record. Training for spacewalks involves swimming in the Neutral Buoyancy Lab and using virtual reality. Astronauts prepare by wearing spacesuits and breathing pure oxygen to prevent the bends. During spacewalks, astronauts use airlocks, safety tethers, and jet thrusters for safety and mobility.

Who was the first person to perform a spacewalk, and when did it occur?

• John Glenn in 1962

• Alexey Leonov in 1965

• Yuri Gagarin in 1961

• Neil Armstrong in 1969

What is the primary purpose of the Neutral Buoyancy Lab in astronaut training?

• To practice emergency procedures

• To conduct underwater experiments

• To test new spacecraft designs

• To simulate zero gravity conditions

How do astronauts prepare their bodies for breathing pure oxygen before a spacewalk?

• By taking medication to prevent decompression sickness

• By exercising in a vacuum chamber

• By consuming a special diet

• By breathing pure oxygen to flush out nitrogen

What is the function of the airlock in a spacecraft?

• To store astronaut tools

• To provide communication with mission control

• To regulate temperature

• To allow safe entry and exit from the spacecraft

What safety measure is used to prevent astronauts from floating away during a spacewalk?

• Gravity boots

• Weighted suits

• Safety tethers

• Magnetic boots