If hot spots are stationary in the core or lower mantle, how does the rising heat pass through the convection cells in the upper mantle? I haven't been able to find much on this, or anything to help me draw a solution or at least a theory of sorts

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.

Anthracite is so hard and pure it is also referred to as a renewable resource metamorphic rock hot bituminous coal dirty fuel