How is a volcanic eruption explained by convection?(1 point)
Responses
Super-heated magma, liquid rock, is created beneath Earth’s surface. The magma is lighter than the solid rock above it, so it rises to collect in pockets toward the surface. As a pocket fills, the pressure increases, which causes the magma to form water vapor and become super-heated steam. When the pressure of the rising steam is greater than the downward pressure of the solid rock, it can break a vent through to the surface. There, the magma becomes lava, and cools. Cooled lava adds to the downward pressure of solid rock, and the cycle repeats.
Super-heated magma, liquid rock, is created beneath Earth’s surface. The magma is lighter than the solid rock above it, so it rises to collect in pockets toward the surface. As a pocket fills, the pressure increases, which causes the magma to form water vapor and become super-heated steam. When the pressure of the rising steam is greater than the downward pressure of the solid rock, it can break a vent through to the surface. There, the magma becomes lava, and cools. Cooled lava adds to the downward pressure of solid rock, and the cycle repeats.
Super-heated magma, liquid rock, is created beneath Earth’s surface. The magma is lighter than the solid rock above it, so the solid rock forms a large cone around the magma to release pressure. When the pressure of the rising magma is greater than the downward pressure of the solid rock, it fills the cone and forms a volcano. There, the magma becomes lava, and cools. Cooled lava adds to the downward pressure of solid rock, and the cycle repeats.
Super-heated magma, liquid rock, is created beneath Earth’s surface. The magma is lighter than the solid rock above it, so the solid rock forms a large cone around the magma to release pressure. When the pressure of the rising magma is greater than the downward pressure of the solid rock, it fills the cone and forms a volcano. There, the magma becomes lava, and cools. Cooled lava adds to the downward pressure of solid rock, and the cycle repeats.
Super-heated magma, liquid rock, is created beneath Earth’s surface. The magma is lighter than the solid rock above it, so it rises to collect in pockets toward the surface. As a pocket fills, the pressure inside increases. When the pressure of the rising magma is greater than the downward pressure of the solid rock, the magma can break a vent through to the surface. There, the magma becomes lava, and cools. Cooled lava adds to the downward pressure of solid rock, and the cycle repeats.
Super-heated magma, liquid rock, is created beneath Earth’s surface. The magma is lighter than the solid rock above it, so it rises to collect in pockets toward the surface. As a pocket fills, the pressure inside increases. When the pressure of the rising magma is greater than the downward pressure of the solid rock, the magma can break a vent through to the surface. There, the magma becomes lava, and cools. Cooled lava adds to the downward pressure of solid rock, and the cycle repeats.
Super-heated magma, liquid rock, is created beneath Earth’s surface. Because it is created under a thick layer of solid rock, the magma is under so much pressure that it explodes out of the earth’s mantle. When the explosion happens the pressure lessens, so the magma can undergo a state change and become solid rock, and the cycle repeats.
None of the responses accurately explain how a volcanic eruption is explained by convection. Convection refers to the transfer of heat through the movement of a fluid, in this case, magma. The correct explanation would involve the rising and sinking of magma due to convection currents within the Earth's mantle. As the mantle is heated from the core, the hot magma rises towards the surface, creating a volcanic hotspot. This movement of magma eventually reaches a point where it becomes trapped and builds up pressure. When the pressure becomes too great, it can cause an explosive eruption, releasing the magma onto the surface as lava.
choose the most accurate response
The most accurate response is:
Super-heated magma, liquid rock, is created beneath Earth’s surface. The magma is lighter than the solid rock above it, so it rises to collect in pockets toward the surface. As a pocket fills, the pressure inside increases. When the pressure of the rising magma is greater than the downward pressure of the solid rock, the magma can break a vent through to the surface. There, the magma becomes lava, and cools. Cooled lava adds to the downward pressure of solid rock, and the cycle repeats.