3.8 billion – 2.5 billion years ago
The Archean is the name of the age which started with the shaping Earth. This time of Earth's history endured quite a while, over 2.5 billion years. When the archean age ended the earth was just coming alive.
Pumping blood in and out of the heart.
Light that passes through a polarizing filter is called a vacuum.
Answer: look at the picture
Explanation: Hope this help :D