Assume(s) that the expansion rate of the universe always stays the same. predict(s) that the universe is expanding today. predict(s) that the universe will someday contract. predict(s) that the average density of mass in universe is exactly the critical density. predict(s) that the universe is expanding faster now than it was in the distant past.

The coasting model assumes that the expansion rate of the universe always stays the same. All four models (coasting, recollapsing, critical, and accelerating) predict that the universe is expanding today. Recollapsing model predicts that the universe will someday contract. The critical model predicts that the average density of mass in universe is exactly the critical density. The accelerating model predicts that the universe is expanding faster now than it was in the distant past.

Cultural convergence is the theory that two cultures will be more and more like each other a very notable example of this is around the u.s.-mexico border, where