Mell How can satellite technology provide evidence for the plate tectonic theory?
Since plate motions are at a global scale, they are best measured by satellite-based methods. By repeatedly measuring distances between specific points, geologists can determine if there has been active movement between plates. Plate motion can be measure as relative movement or absolute movement.
What technology did scientists use in the mid 1980s to map the mid ocean ridges?
Inside Earth – Plate Tectonics retake
| Question | Answer |
|---|---|
| What technology did scientists use in the mid-1900’s to map the mid-ocean ridge? | sonar |
| When you touch a hot pot or pan, energy moves from the pot to your hand. This is called… | heat transfer |
| Earth’s mantle is… | a layer of hot rock. |
What is best explained by plate tectonics?
The theory of plate tectonics states that the Earth’s solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle. Oceanic and continental plates come together, spread apart, and interact at boundaries all over the planet.
What are two pieces of evidence that support seafloor spreading?
Abundant evidence supports the major contentions of the seafloor-spreading theory. First, samples of the deep ocean floor show that basaltic oceanic crust and overlying sediment become progressively younger as the mid-ocean ridge is approached, and the sediment cover is thinner near the ridge.
What would Earth be like if we didn’t have plate tectonics?
What would Earth be like without plate tectonics? We’d have many fewer earthquakes and much less volcanism, fewer mountains, and probably no deep-sea trenches. Our weather would be more uniform due to the lack of significant topography and landscapes would be older due to a lack of tectonic renewal.