The Ice Age was the area of time when the Earth was much colder than it is now. This was a time when much of the Earth was covered by ice sheets. The Ice Age is thought to have started more than 70,000 years ago and it ended around 10,000 years ago, according to some scientists.
Many scientists believe that 1/3 of the entire Earth was covered by some type of ice. It is thought that there were sheets of ice that were over a mile thick. It is said that New York was covered by ice that was thicker than 1,000 feet.
Many people feel that the Ice Age happened because of the temperature changes that happened on the Earth. When the Earth cools down and warms up again, it causes there to be different things that can happen, and one is thought to be the Ice Age.
Some believe that the way that the Earth was positioned and the sun was hitting the Earth and the way that the tilt of the Earth changed, that this caused the weather to change and it caused to currents of the ocean to change and this created the Ice Age.
When people study the Earth and the land around it, they find out things about the world that other people do not know. They are able to study things that have happened in the past by looking at fossils and different chemicals that are found in the rocks.
Scientists have studied the land and have found that there is evidence that in Northern Europe and in North America that the Ice Age really existed. Some of the things that have been discovered could have only happened if there were large pieces of ice or giant glaciers that were moved.
Some scientists believe that we are still living in part of the Ice Age called the Quaternary Ice Age. This is where the Earth is warmer than the earlier period of the Ice Age but colder than other times when the Earth was warmer. This is also called interglacial period.
Scientists believe that there are different parts of the Ice Age and the interglacial period is the time of the Ice Age where the weather is warmer and where glaciers are getting smaller or going away all together.
The Glacial Period, as described by scientists, is the period when the Earth is colder and when glaciers are getting bigger or forming.
According to some scientists, there have been five different ice ages over the past millions of years and even 11 different ice ages in the past 4.6 billion years. These last few include Huronian, Cryogenian, Andean-Saharan, Karoo and Quaternary.
The last ice age that happened is sometimes called the “Great Ice Age” and this was when 1/3 of the Earth was covered in ice.
When the ice age formed, many glaciers were formed as well. Glaciers are solid sheets of ice that cover both water ways such as rivers and lakes and land areas, as well. When the ice would begin to melt, it would freeze again, and this is what caused the ice age to last so long.
When the Ice Age ended, it caused the glaciers and other ice to melt and this melted ice helped to form rivers, lakes and streams. It also left different rocks and other debris behind as the glaciers moved across the area.
When there are different changes to the Earth, different things can happen. Scientists believe that the climate is what caused the ice ages to happen. Some believe that other things can cause ice ages to form such as:
There are many different animals that lived in the Ice Ages and these include:
Animals that lived during the Ice Ages have become extinct. This means that they all died off and they no longer exist.
Different scientists and paleontologists have found fossils that prove that these animals once existed during the Ice Ages.
It is believed that people lived in the Ice Ages and that they hunted and made warm clothing in order to live. When people hunted animals in the Ice Ages, it is believed that they used all parts of the animal for food, clothing, blankets, shelter, and for weapons.
It is thought that during the Ice Ages that the Earth was all the tundra biome. Tundra is an area that is cold and where there is little or no trees or vegetation. Plants have a hard time existing in the tundra biome because it is very cold, and the ground is frozen, so it is hard for plants or trees to grow.
There are still some tundra biomes that exist today in places such as: