<span>The mineral crystals in obsidian are too small to see without a microscope. This is because the rock cools so rapidly from magma that crystals barely have time to form. Obsidian is a normally happening volcanic glass framed as an extrusive molten shake. It is delivered when felsic magma expelled from a well of lava cools quickly with negligible precious stone development.</span>
We see the moon because the sun's light reflects off it. So the phases change depending on how much the sun reflects of it. The moon circles around the Earth so at certain times there will be a full moon and at certain times a new moon and everything in between.
The digestive system, it breaks down the material into nutrients and the circulatory system then carries it out to the cells throughout the body. hope this helps!!!
A . Human society is the best answer :)
The glacial budget refers to the input of water to the output of water. The input is when people put water in the glacier and the output is when the glacier starts to evaporate.
