Their marginal People keep spending additional units of a particular resource on a want until their marginal benefit is
cost.

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Asolid that forms and separates from a liquid mixture is called

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false