What does it mean for a substance to be amphoteric

What three things determine the shape and size of a puddle when water is poured out onto a surface

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

Predict the reactants of this chemical reaction. that is, fill in the left side of the chemical equation. be sure the equation you submit is balanced. (you can edit both sides of the equation to balance it, if you need to.) note: you are writing the molecular, and not the net ionic equation. > cacl2(aq) + h20(l)