A physical change from the solid state to the liquid state is often caused by:

In the following diagram, four different index fossils are labeled: which of the labeled fossils comes from the oldest organism? a b c d

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.

Many areas surrounding the caspian sea contain important a. rare minerals b. forestry resources c. gold and silver mines d. oil and natural gas fields