Question

which evidence supports the claim that earths continents formed during precambrian time?
compaction caused rock to cool and rise to form pieces of crust.
earth collided with a large object and threw material onto earths surface.
collisions with comets added land masses to earths surface.
earths surface cooled, causing rocks to cool and harden.

Explanation:

• Option 1: Compaction causes rocks to be denser and sink, not rise.
• Option 2: The collision with a large object (Theia) is related to the formation of the Moon, not continental formation.
• Option 3: Comet collisions mainly add water and volatile substances, not land masses for continent - like structures.
• Option 4: As Earth's surface cooled, the molten rocks (magma) on the surface cooled and solidified to form the early crustal rocks which are the basis for continental formation.

Answer:

Earth's surface cooled, causing rocks to cool and harden.