Which of the following describes how Marie Tharp and Bruce Heezen found evidence that led to the theory of plate tectonics? (1 point)
Responses
They observed two tectonic plates moving away from each other.
They observed two tectonic plates moving away from each other.
They mapped the structures on the ocean floor using sonar rays to collect data.
They mapped the structures on the ocean floor using sonar rays to collect data.
They mapped the structures on the ocean floor using a video recording to collect data.
They mapped the structures on the ocean floor using a video recording to collect data.
They observed that the continents seem to fit together like a puzzle.
They observed that the continents seem to fit together like a puzzle.
The correct answer is: They mapped the structures on the ocean floor using sonar rays to collect data.
Marie Tharp and Bruce Heezen made significant contributions to the theory of plate tectonics by mapping the ocean floor using sonar rays. Sonar, which stands for Sound Navigation and Ranging, involves emitting sound waves and measuring the time it takes for them to bounce back. By analyzing these sonar reflections, they were able to create detailed maps of the ocean floor.
Through their mapping efforts, Tharp and Heezen discovered various features on the ocean floor, such as the Mid-Atlantic Ridge and deep ocean trenches. These findings provided evidence for the movement of tectonic plates and the existence of plate boundaries. They also observed the presence of magnetic stripes on the ocean floor, which further supported the concept of seafloor spreading.
Overall, Tharp and Heezen's mapping work using sonar rays played a crucial role in shaping our understanding of plate tectonics and provided strong evidence for the theory.