Question

how to we know or prove that coal is made from dead remains of plnts and animals​

Answer 1

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Coal began forming from the remains of plants that died during prehistoric times long before the dinosaurs roamed the Earth. After the plants were buried deep in the Earth, heat and pressure combined to turn the plant remains into a fossil fuel rock called "coal".

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Answer 2

Answer:

The conditions that would eventually create coal began to develop about 300 million years ago, during the Carboniferous period. During this time, the Earth was covered in wide, shallow seas and dense forests. The seas occasionally flooded the forested areas, trapping plants and algae at the bottom of a swampy wetland. Over time, the plants (mostly mosses) and algae were buried and compressed under the weight of overlying mud and vegetation.

As the plant debris sifted deeper under Earth’s surface, it encountered increased temperatures and higher pressure. Mud and acidic water prevented the plant matter from coming into contact with oxygen. Due to this, the plant matter decomposed at a very slow rate and retained most of its carbon (source of energy).

These areas of buried plant matter are called peat bogs. Peat bogs store massive amounts of carbon many meters underground. Peat itself can be burned for fuel, and is a major source of heat energy in countries such as Scotland, Ireland, and Russia.

Under the right conditions, peat transforms into coal through a process called carbonization. Carbonization takes place under incredible heat and pressure. About 3 meters (10 feet) of layered vegetation eventually compresses into a third of a meter (1 foot) of coal!

Coal exists in underground formations called “coal seams” or “coal beds.” A coal seam can be as thick as 30 meters (90 feet) and stretch 1,500 kilometers (920 miles).