Question

mountain ranges often appear on the edges of continents. what theory does this support?
o mountains were formed when earths crust cooled and earth shrank.
o mountain ranges were formed when continents collided
o mountain ranges did not exist millions of years ago.
o mountain ranges were formed only by glaciers.

Explanation:

• When continents collide (continental - continental plate convergence), the crust is compressed and uplifted, forming mountain ranges. For example, the Himalayas were formed by the collision of the Indian and Eurasian plates.
• The theory that mountains were formed when Earth's crust cooled and Earth shrank (contraction theory) has been largely discredited. Modern plate - tectonic theory provides a more comprehensive explanation.
• The statement that mountain ranges did not exist millions of years ago is incorrect as there is geological evidence of ancient mountain ranges.
• While glaciers can shape mountain ranges (e.g., by erosion), they are not the sole cause of mountain - range formation.

Answer:

Mountain ranges were formed when continents collided.