What will happen when the earth freezes?

Answer 1

The Earth experienced "Ice Ages" every few tens of thousands of years and cold and warm periods due to climate change can last millions of years. Clearly, when those things occur, large parts of the planet are covered with Glaciers, but those are temporary and not related to the loss of heat from the core of the Earth.

The Earth has been cooling for four and a half billion years, since it was first created as a hot molten ball of rock and metal. It cools from the outside inward, just like any object.

The outer layer of the Earth froze a long time ago. It is solid rock. That rock layer gets a little thicker as time goes on. The core of the Earth is cooling, but slowly. It is about 5,000 degrees C now and has only lost a couple of hundred degrees over the last few billion years.

The oceans are not frozen now, but they probably were sometime in the first half billion years of the existence of Earth. Fortunately, the sun has warmed slightly so the ocean melted and enough greenhouse gases were produced to melt the oceans.

The Earth will continue to cool for about another 4 or 5 billion years, but not enough to freeze the oceans unless some catastrophe occurs.

When Earth gets about 10 billion years old, the Sun will become a red giant and evaporate the oceans and blow off all the atmosphere.

If the Earth is still around after that, then things will get pretty cold and freezing will commence in earnest.

Answer 2

If the Earth were to freeze completely, all life as we know it would perish due to extreme cold temperatures. The freezing of the Earth's surface would disrupt ecological systems, leading to the collapse of food chains and ecosystems. Human civilization would not survive without the necessary resources and conditions for survival.