Question

_______ suggests that Earth is young, while ______ proposes that Earth is old.

Answer 1

1. Catastrophism
2. Uniformitarianism

Answer 2

Catastrophism

Uniformitarianism

Step-by-step explanation:

Catastrophism : This is the theory which explains that the properties of earth have been formed by sudden large events in quick period of time. Formation of mountains is an example of such processes.

Uniformitarianism : This is the theory that explains extremely slow processes like erosion and deposition that have remained constant all through history.