Question

Q1) Why do mountaineers, sea-drivers, and astronauts carry oxygen cylinders with them?

Q2) The process in which water vapour changes into water droplets is called condensation. What conditions are required for this process to occur?

Answer 1

1)As we go higher and higher the pressure and the oxygen decrease so as due to less oxygen content theycarry oxygen cylinders. Mountaineer's carry oxygen cylinders because when they go high the the altitude decrease and the level of oxygen goes down so they carry oxygen cylinders

Answer 2

Hey friend here's your answer

1 ans . As on higher altitudes there is lack of oxygen the mountaineers need oxygen cylinder
Same in underwater due its depth and outer space specially other planets di not have oxygen as their atmospheric content

2 ans. The conditions are somewhat like this :
cold weather
change in temperature

That's it !!!! hope might help you