How Plate Tectonics Was Discovered

What evidence supports the theory of continental drift?

• The alignment of mountain ranges across different continents

• The shape similarity of the coastlines of Africa and South America

• The presence of similar rock formations in different continents

• The occurrence of deep earthquakes in tectonic plate boundaries

What is the significance of the magnetic anomalies found in the ocean floor?

• They indicate the presence of ancient civilizations

• They are a result of meteorite impacts

• They are caused by underwater volcanic eruptions

• They provide evidence for the movement of tectonic plates

How do scientists determine the direction of movement of tectonic plates?

• By monitoring the strain gauges placed across fault lines

• By analyzing the growth rings of trees near fault lines

• By observing the color changes in rocks due to seismic activity

• By studying the behavior of animals in earthquake-prone areas

What geological feature is formed when two tectonic plates collide?

• Volcanic islands

• Deep ocean trenches

• Coral reefs

• Mountain ranges

Which region is known for its creeping section along the San Andreas Fault?

• Hollister

• San Francisco Bay Area

• Los Angeles

• Portland

What is the main cause of ignimbrites and welded tuff formations in volcanic eruptions?

• Ash clouds

• Mudslides

• Pyroclastic flows

• Lava flows

How do scientists use microearthquake mapping to study fault lines?

• By measuring the temperature changes in fault zones

• By analyzing the seismic waves from large earthquakes

• By studying the magnetic anomalies in the Earth's crust

• By monitoring small earthquakes with seismographs

What is the main impact of plate tectonics theory on the field of geology?

• It has caused a decrease in mountain building

• It has increased the occurrence of volcanic eruptions

• It has revolutionized the understanding of earthquakes

• It has led to the discovery of new minerals

What is the role of the Lamont Observatory in studying earthquakes?

• To predict the exact time of future earthquakes

• To monitor the strain between tectonic plates

• To study the effects of earthquakes on wildlife

• To create artificial earthquakes for research purposes

What is the significance of the Mediterranean region in plate tectonics?

• It is an example of plate collision and mountain building

• It is a potential site for future volcanic eruptions

• It is a region with no tectonic activity

• It is a region with frequent meteorite impacts