How does the process of ridge push cause the formation of new oceans? Ridge push causes a rift valley; as the plates move apart, a new ocean basin forms, filling with water and eventually becoming a mature ocean.
Ridge push causes a convergent plate boundary; as the plates move together, new islands form, which “trap” water between them, causing an ocean to form.
Ridge push causes plates to move apart from one another, creating a deep trench that eventually widens enough to become a new ocean.
Ridge push causes the plates to subduct, causing a deep trench that eventually fills with water and becomes a new ocean.

Match your vocabulary word to its definition. 1. emigration 2. immigration 3. migration 4. overpopulation 5. sustainable development 6. under population 7. unsustainable development 8. urbanization the movement from one place to another the number of people exceeds the available natural resources in an area leaving one's homeland to settle in a new place the increase in the population of a city the movement of people to a new country the ability to meet current needs without reducing the ability to meet future needs resources being used up at a faster rate than they can be replenished birth rate insufficient to replace the existing population