The difference between stones and metals
Not every solid object in nature is a rock. There are also metals. For example, pavements are made from stone (this is a type of covering for city streets), and sewer manholes are made from metals. But how are metals and stones different?
It turns out that metal can be melted (to do this it must be heated very much) and poured into some form. After cooling, we will get a new metal object, and the properties of the material will be preserved. This process is called casting and is used in industry to make parts. But stones cannot be cast. Some stones simply burn when heated, while others change their properties too much. Metals have many other distinctive properties that are studied in physics and chemistry lessons.
What are stones? Origin of stones
Stones are solid bodies that are non-living rocks. Most often, stones are formed from other stones. For example, if you drop a stone from a great height, it will break into many smaller stones.
Eruption
But there is another way to form them. During volcanic eruptions, lava, a substance heated to enormous temperatures, is ejected from the depths of the Earth to the surface. As it cools, stones form.
