The video discusses four potential models of how the expansion of the universe changes with time. Drag the correct model description from the left-hand column to the appropriate blank in the sentences in the right-hand column.
Only the coasting model assume(s) that the expansion rate of the universe always stays the same.
All four models predict(s) that the universe is expanding today.
Only the recollapsing model predict(s) that the universe will someday contract.
Only the critical model predict(s) that the average density of mass in universe is exactly the critical density.
Only the accelerating model predict(s) that the universe is expanding faster now than it was in the distant past.
