Which of the following describes how Marie Tharp and Bruce Heezen found evidence that led to the theory of plate tectonics?
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 observed two tectonic plates moving away from each other
They observed that the continents seem to fit together like a puzzle
They mapped the structures on the ocean floor using sonar rays to collect data
The two types of structures that form at divergent boundaries are:
1. Ridges: Divergent boundaries occur where tectonic plates move away from each other, creating a gap. As the plates separate, magma from the Earth's mantle rises to fill the gap, solidifies, and forms new crust. This process creates underwater mountain ranges called ridges.
2. Cracks/Faults: As the tectonic plates move apart, the crust is stretched and fractured. This leads to the formation of cracks or faults along the boundary. These cracks can result in earthquakes and allow magma to rise to the surface, forming volcanic activity.
The correct answer is: Due to subduction, magma shoots out of the crust.
At convergent boundaries, where two tectonic plates collide, one plate can slide beneath the other in a process called subduction. As the subducting plate sinks into the mantle, it heats up and begins to melt. This molten rock, or magma, can then rise to the surface through cracks and weaknesses in the overriding plate, leading to the formation of volcanoes.
The correct answer is: Transform boundary.
Are you sure?
Yes, I am sure. Marie Tharp and Bruce Heezen used sonar mapping to collect data on the structures of the ocean floor, which ultimately provided evidence for the theory of plate tectonics.
What types of structures form at divergent boundaries? select two answers
Ridges
Cracks
Volcanoes
faults
trenches
Why can volcanoes form at convergent boundaries?
Due to plates smashing into each other, the crust folds upward.
Due to subduction, a great height difference occurs on the sea floor.
Due to subduction, magma shoots out of the crust.
Due to plates smashing together, the crust cracks and starts falling apart.
Two plates slide past each other, causing the crust of each plate to start falling apart. Soon, a crack forms between the two plates.
Which type of boundary is the statement describing?
Divergent boundary
Divergent boundary
Trench boundary
Trench boundary
Transform boundary
Transform boundary
Convergent boundary