It would be better to describe grass as a plant, rather than a mineral or a substance. However if by grass you mean marijuana, then it falls under the category of controlled substances.
iron
Gold!
No. A pure substance describes one that contains only one type of element/molecule. Mineral water is a mixture, since it contains many different types of minerals, next to water, and can therefore not be called a "pure" substance.
Grass growing in a lawn is a physical change because the origonal substance still exists. :) good luck!
kjhgkgh
A mineral is, by definition, a solid substance.
Coal is not a mineral. A mineral is a solid non-organic substance. Coal is an organic substance.
Hydroxylapatite is the mineral substance in bone. It is a calcium compound.
No, a mineral is a hard substance
To be a mineral, a substance must meet certain criteria. One of these is that the substance be solid. Mineral oil does not meet this requirement.
Theoretically a mineral is a pure substance; practically this situation is not so frequent.
how might you decide whether a given substance is a mineral
how might you decide whether a given substance is a mineral
how might you decide whether a given substance is a mineral
mineral... the answer is a mineral
Ribena
It is a mineral, and is iron rich. Hematite and magnetite are both suggestible minerals