Continental Drift

What evidence supports the theory of Continental Drift?

• Similar rock formations on different continents and glacial grooves found in various locations.

• The presence of volcanoes on all continents.

• The existence of deserts in polar regions.

• The alignment of mountain ranges across continents.

Who proposed the theory of Continental Drift?

• Alfred Wegener

• Charles Lyell

• James Hutton

• Henry Hess

What is the theory of Continental Drift?

• The theory that continents were once joined together in a supercontinent called Pangaea and have since drifted apart to their current locations.

• The idea that continents are fixed and do not move over time.

• A hypothesis that suggests the Earth's crust is made up of several large plates that float on the mantle.

• The belief that continents were formed by volcanic activity and have always been in their current positions.

What are tectonic plates?

• Large pieces of the Earth's lithosphere that move and interact with each other.

• Small fragments of the Earth's crust that do not move.

• Layers of water beneath the Earth's surface.

• Atmospheric layers that protect the Earth from solar radiation.

What role do earthquakes play in understanding tectonic plates?

• They occur randomly and have no relation to tectonic plates.

• They provide evidence of the Earth's age and formation.

• They occur at the boundaries of tectonic plates, providing evidence of their movement and interaction.

• They are caused by volcanic activity and do not relate to tectonic plates.

What is the difference between continental crust and oceanic crust?

• Continental crust is thicker and less dense than oceanic crust.

• Continental crust is thinner and denser than oceanic crust.

• Continental crust and oceanic crust are identical in thickness and density.

• Oceanic crust is thicker and less dense than continental crust.

What is a supercontinent cycle?

• A process where continents drift apart and come together over geological time, forming and breaking apart supercontinents.

• A cycle of climate change affecting only the polar regions.

• A geological phenomenon that only occurs in oceanic crust.

• A method of measuring the age of rocks based on their mineral composition.

How does the shape of continents support the theory of Continental Drift?

• The shapes of continents, such as the way South America and Africa fit together like puzzle pieces, support the idea that they were once joined.

• Continents are fixed in place and do not move over time.

• The shapes of continents are purely coincidental and have no relation to their movement.

• The continents were formed by volcanic activity and have no connection to each other.

What is the lithosphere?

• The liquid layer of the Earth beneath the crust.

• The rigid outer layer of the Earth, consisting of the crust and the upper mantle, which is divided into tectonic plates.

• The inner core of the Earth made up of molten iron and nickel.

• The atmosphere surrounding the Earth that contains gases essential for life.

What are glacial grooves?

• Scratches or grooves carved into the Earth's surface by the movement of glaciers, providing evidence of past glacial activity.

• Natural formations created by wind erosion in desert areas.

• Deep valleys formed by river erosion over thousands of years.

• Rock formations that occur due to volcanic activity.