Why does tap water or pool water typically test positive for the presence of chlorine

Subduction zones occur on earth where dense oceanic crust dives under more buoyant continental crust. these boundaries are characterized by a deep ocean trench next to a high continental mountain range, large numbers of earthquakes and volcanoes. all of this is further evidence for the a) big bang theory b) origin of the species eliminate c theory of plate tectonics d theory of natural selection 4 sedimentary rocks found high in the himalayen mountain

How have the greenhouse gasses increased from the year 2000 to 2018

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