An unknown substance turns methyl orange solution red. this shows that the substance

is acidic in nature

Explanation:

Acid base indicators are usually weak acids or weak bases. They change their color in the solution with change in the pH.

For any indicator say HIn , the dissociation can be shown as:

Methyl orange is one such indicator which shows red color in acidic medium and yellow color in basic medium.

Thus as the color of the methyl orange has turned red, the solution must be acidic in nature.

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).

metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)