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 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.
They observed two tectonic plates moving away from each other.
They mapped the structures on the ocean floor using sonar rays to collect data.
What types of structures form at divergent boundaries? Select the two correct answers. (1 point)
Responses
Ridges
Ridges
Cracks
Cracks
Faults
Faults
Trenches
Trenches
Volcanoes
Ridges
Volcanoes
Why can volcanoes form at convergent boundaries? (1 point)
Responses
Due to plates smashing together, the crust cracks and starts falling apart.
Due to plates smashing together, the crust cracks and starts falling apart.
Due to plates smashing into each other, the crust folds upward.
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, a great height difference occurs on the sea floor.
Due to subduction, magma shoots out of the crust.
Due to subduction, magma shoots out of the crust.
Question
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?
(1 point)
Responses
Convergent boundary
Convergent boundary
Divergent boundary
Divergent boundary
Transform boundary
Transform boundary
Trench boundary