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.
Fossils can be found in the Earth's crust.
The crust is the thinnest layer of the Earth. The fossils are most probably be found in this layer because it is the outermost layer. Also, the deeper the layer of the Earth, the higher the temperature that it has, and it probably cannot preserve the fossil.
True. Sensory cells are are cells responsible for detecting information through receptors that are found on the surface of the body. Information like sound, touch, taste, smell, and even temperature are detected through several sensory cells in the body. The skin, nose, tongue, and ears are organs of the body that are composed of several of these cells.
