Ores contain minerals that are of economic importance. Some of these may be considered beautiful and as such their appearance may contribute to their economic value (for example precious stones e.g. diamonds).
False. Ores contain metals. Iron ore, silver ore, uranium ore, gold ore.
true or false?
No. Ores are mined because they contain valuable substances. Some of those substances may be valuable for their beauty, but most are valuable because they are useful.
Organic is a word that refers to substances that contain carbon. Organic compound is a phrase that refers to substances that contain carbon.
what are the substances contained in hydrogen
Oxygen is an element and, therefore, can contain no minerals (or other elements or compounds). However, many minreals contain oxygen.
salt
No. Ores are mined because they contain valuable substances. Some of those substances may be valuable for their beauty, but most are valuable because they are useful.
Mud contain soil, sand, minerals, vegetal material etc. mixed with water.
Minerals were not once plants and animals. This is because life is composed of cells and minerals do not contain cells.
Calcium makes them hard.
Calcium makes them hard.
The minerals that contain sulfur and oxygen is sulfates.
All of them contain variable amount of minerals.
Minerals
no minerals
because it seeks in to the layer B
because it seeks in to the layer B
They are both predominantly made of calcium but they have different substances mixed in with them so they are slightly different.