Asked in Earth Sciences
What type of magma is thin moves quickly and flows smoothly?
Asked in Science
Is the seafloor spreading apart hot salt water moves upward and flows from the cracks?
Asked in Paleontology
How is dolerite formed?
Dolerite is a dark, igneous rock. It is formed under basaltic volcanoes, like those at mid-ocean ridges. It cools pretty quickly when magma moves into the fractures and weak zones below a volcano. Because it cools so quickly, you can see large crystals on the rock. Once the magma moves into the rock, it forms dikes and or sills.
Asked in Earthquakes, Volcanoes, Plate Tectonics
How can mantle flow because its made of hot liquid magma?
Asked in Lakes and Rivers, Oceans and Seas
What is a mass movement or flows that moves water horizontally?
Asked in Physics, Science Fiction
What can make machines more efficient by reducing friction?
Asked in Plate Tectonics
Explain the sequence of events that cause the movement of the plates on the earths surface use these terms core heat mantle flow rise sideways drag cools sinks?
Asked in Volcanoes
Why may a volcano that is about to erupt give off more gas?
Asked in Mountains, Mount St. Helens
How does the presence of water in magma affect a volcanic eruption?
Because if the water content of magma is high, an explosive eruption is more likely. Because magma is underground, it is under intense pressure and water stays dissolved in the magma. If the magma quickly moves to the surface, the pressure suddenly decreases and the water and other compounds become gas. As the gases expand rapidly, an explosion occurs. (I had the same question on my homework chapter review #16 ;)