Answer: 1. recollapsing universe
4. critical universe
3. coasting universe
2. accelerating universe
Explanation:
The universe is continually growing and galaxies are moving apart relative to one another.
These four models foresee the expansion and possible contraction of the universe.
Recollapsing universe: this model predicts that galaxies will stop growing apart and start getting closer to one another. It predicts that there is enough density to stop the growth of the universe in the future.
Critical universe: the universe has the same density as the critical density. This is the difference between the density the universe requires to stop and that of a universe with too little density to ever stop expanding
.
Coasting universe: has enough density to enable galaxies to keep growing apart
, in essence, less than the critical density.
Accelerating universe: this model explains that the distance of far-off galaxies is growing exponentially from an observer over time.
Answer: Subduction happens and one plate moves below the other. Magma seeps up along plate boundaries and forms mountains.
Explanation:
Answer:
The Marsupials would be extinct as they wont be able to migrate to South America and Australia.
Explanation:
- If the plate tectonics would be in a position as they are in today then the marsupials population that is found today in Australia and other countries would not have been possible as the plate tectonics would not allow them to migrate to these places.
- Even if they would migrate to another pace they would not survive as these creatures don't know how to travel longer distances and would eventually die of starvation.
