Why was Galileo's revelation about the cosmos so shocking

You have been tasked with sorting the rock samples shown into three categories, with two rocks in each category. what attribute would you use to sort these rocks? which rocks would be in each category? rocks: obsidian, coquina limestone, granite, soapstone,pumice, and gneiss.

The creation of the trans-siberian railway allowed people to travel across russia. how could this railway impact russian culture?

One disadvantage that darwin faces today is w. enemy attacks x. natural disasters y. lack of land bridge z. high population density