You would need sunblock when climbing a mountain because as you reach the higher altitudes you are getting closer to the sun so your skin is my likely to get burnt. Also, at higher altitudes there is alot of wind and the sunblock somewhat contributes to blocking the wind.
when they are climbing the mountain
when climbing a steap part of a mountain
It depends how strong the sunblock is.
Well, they need to know which way they are going.
first of all you'll need to carry 50-90 lbs for 2-6 hours a day going uphill
Sunscreen and sunglasses protect against the sun. Although it may be cold, the sun will still be out during the day. Therefore, mountain climbers and people in general use sunblock and sunglasses in cold temps to protect their eyes and skin from the sun.
To climb Mount Everest you will need experience from climbing on other high altitude mountains. You will also need to be good on using crampons and have basic mountain knowledge.
African Americans don't need sunblock because they don't get sun burned is an untue statement!! They do get burned and they do need sunblock. Everyone needs some sort of sun protection.
You do not really need survival skills to climb Mount Everest. The sort of skills needed would be high altitude mountain climbing, ice climbing, rope skills, leadership skills and self arrest skills. You would be expected to know how to dress and wear the correct safety clothing and equipment.
It will depend on the mountain: are you intending to be up and down in a single day? Or are you bringing a tent and extra gear? Is it winter and you're travelling over snow/ice? or is it dry? If you're asking what you need because you'd like to go climbing, then specifically you'll need a guide who will tell you the rest. Otherwise, even on the most benign mountain, you should expect to get yourself in trouble.
It is said the Mount Everest is not a technical mountain to climb but you will still need a good knowledge of mountain climbing. There is a lot of training needed if you wanted to climb a high mountain. Have a look at the link.
You would need high friction between your shoes and the climbing surface to ensure stability and grip while climbing. High friction helps prevent slipping and allows you to push off with confidence, aiding in your ability to ascend and navigate the climbing route safely.