Which nations have negative population growth? ldcs mdcs

What did photos by the hubble space telescope reveal about the great dark spot?

The last photo u wonder what is this telling me to do?

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.