A drop of ink is placed in a glass of pure, clear water, and after a while all the water turns blue. This spread is as a result of what

Explain the significance of thesaurus geographicus

Methane gas created by a cows flatulence especially in a large herd is a greenhouse gas. true or false.

The table below shows the elements that mainly comprise each of the four layers of earth: elements in layers layer main elements crust oxygen, silicon mantle iron, magnesium outer core iron, nickel inner core iron which of these elements make up the layer that is 0.2 to 1.1 percent of earth's total diameter?