What if the world lost oxygen for five seconds....

Imagine if all the Earth's oxygen disappeared, just  for five seconds. Would we just hold our breath? What would happen to the atmosphere? What would happen to the enviroment?

Take a nice deep breath, how satisfying that is? What you are breathing in is Oxygen, that takes up roughly 21% of our atmosphere, 78% of nitrogen. Although it's not the most abundant gas in our atmosphere , it is the most important. Without oxygen, plants, animals,  and us humans wouldn't be where we are today.

Five seconds may not sound like a whole lot of time to be without oxygen. Most of us can go at least 30 seconds without taking a breath, so it would go too fast for your body to even notice if oxygen disapprars just for 5 seconds. Your breathing would actually be normal. However, what about  everything else?

In just 5 seconds, the Earth would look completely different. Without oxygen, you can say goodbye to Mython Dam, Bhakra - Nangal Dam and other dams or other infrastructure that is made out of concrete. These structures would instantly collapse because oxygen acts as a special binding agent to concrete. Without it concrete is just dust.

Speaking of buildings, any untreated metal would be instantly fused together. This is because there is a layer of oxidation on metals that prevents them from welding together. Without that layer, metals would instantly  fuse to each other.

If you happen to be relaxing at the beach at the time, expect a severe sunburn. The ozone layer, our protection against the sun's UV rays, is made of Ozone (O3), which is an allotrope of oxygen . Take away the oxygen and the Earth would become extremely dangerous. There would be nothing protecting us from the sun's UV rays. In addtion to a sunburn, our blood vessles would explode. Losing oxygen means losing 21% of our air pressure. A drop in air pressure that drastic would disrupt the balance between our blood pressure and atmospheric pressure. This would result in our blood vessles bursting. 

Without oxygen, there is no fire. The combustion process in vehicles won't be able to occur. Any mode of transport that isn't electric will automatically shut down, so millions of cars will stop on their tracks without power.

The sky will be completely dark. Before lights hits the earth, light from the sun bounces off multiple particeles in the air. Without oxygen in the atmosphere there are less things to bounce off, and the sky  will apear dark.

The Earth's crust would completely crumble as the Earth's crust is made up of 45% oxygen. The crust would crumble until there is nothing left, sending you and everyonr on the planet into a free fall.

But luckily you can take a deep breath 21% oxygen, knowing this will never happen.