Answer:
galaxy
Explanation:
galaxy is the largest in size
The gases we create are adding to that blanket making sun light harder to escape,so the world heats up due to this addition to the layer
Answer:
O-18 is used as a tracer in many hydrologic studies. It is most often used as a component in a mixing-model and hydrograph separation, as O-18 acts conservatively and is applied naturally and uniformly over broad areas. O-18 can be used when different sources (old water/new water) have different isotopic values.
A. (cold solutions hold on to their solutes better)