Cambios en la Tierra: montañas en construcción

The video explains the formation of scoria cones through volcanic eruptions, where small rocks and particles are ejected from a volcano. It contrasts this with the formation of the Rocky Mountains, which were created by large forces pushing sections of the Earth's crust upward, resulting in rugged mountain ranges. Not all mountains are formed by volcanic activity; some are shaped by tectonic forces.

What is a scoria cone primarily composed of?

• Lava flows

• Ash layers

• Small rocks ejected from a volcano

• Sedimentary deposits

How are some mountains formed over time?

• By erosion of sedimentary layers

• Through multiple volcanic eruptions

• Through tectonic plate subduction

• By the accumulation of glacial ice

Which of the following is not a way mountains can form?

• Volcanic eruptions

• Accumulation of sand dunes

• Erosion of river valleys

• Uplift of Earth's crust

What geological process led to the formation of the Rocky Mountains?

• Melting of glaciers

• Deposition of volcanic ash

• Large forces pushing the Earth's crust upward

• Erosion by wind and water

What is a characteristic feature of the Rocky Mountains?

• Smooth, rolling hills

• Flat plateaus

• Rugged, elevated terrain

• Sandy deserts