What is the most common mineral group in the earths crust

The silicates

Explanation:

The silicates are the most common mineral groups on the earth crust. They account for a bulk 90% of all rocks and earth materials we find on our thin crust.

The silicates are made of the fundamental unit which is the SiO₄⁴⁻ tetrahedron. This forms the basic unit through which other elements combine with them. The silicates makes up the bulk of sands we have as silica.

The tetrahedron makes silicates unique and able to combine readily with other elements to form a wide range of minerals.

Most rocks found on the earth surface and in the crust are for their most parts made up of silicate minerals. Some of these minerals are olivine, quartz, beryl, phlogopite, feldspars etc.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.