Which statement is correct about the movement of plates that sit on top of the mantle? (1 point) Responses They regularly move because of the convection currents of magma. They regularly move because of the convection currents of magma. They regularly move because of the convection currents of oceans. They regularly move because of the convection currents of oceans. They never move because they are connected to mountains. They never move because they are connected to mountains. They never move because they are connected to Earth’s crust.
The correct statement is:
They regularly move because of the convection currents of magma.
Which statement is correct about the flow of thermal energy inside Earth?(1 point)
Responses
Energy flow inside the mantle causes magma to sink deeper.
Energy flow inside the mantle causes magma to sink deeper.
Energy flow inside the mantle causes magma to rise.
Energy flow inside the mantle causes magma to rise.
Energy flow inside the crust causes magma to rise.
Energy flow inside the crust causes magma to rise.
Energy flow inside the crust causes magma to sink deeper.
The correct statement is:
Energy flow inside the mantle causes magma to rise.
Which is a result of boundary plates colliding or sliding past each other? (1 point)
Responses
earthquakes occur
earthquakes occur
mountains form
mountains form
volcanoes erupt
volcanoes erupt
valleys form
The correct answer is:
earthquakes occur
The correct statement is: "They regularly move because of the convection currents of magma."
The correct statement about the movement of plates that sit on top of the mantle is: "They regularly move because of the convection currents of magma."
To understand why this statement is correct, we need to understand the concept of plate tectonics. The Earth's surface is made up of several rigid plates that float on the semi-fluid layer of the mantle below. These plates are constantly moving, albeit very slowly, and the movement is driven by convection currents in the mantle.
Convection currents are circulating motions of material caused by differences in temperature and density. In the Earth's mantle, heat from the core causes the magma to become less dense and rise towards the surface, while cooler material sinks back down. This process creates circular patterns of circulation, similar to the boiling of water in a pot.
As the circulating magma pulls apart in one area, it pushes the plates apart, creating divergent boundaries. Conversely, where the circulating magma pushes together, it forces the plates to collide and form convergent boundaries. Additionally, where the plates slide past each other horizontally, transform boundaries are formed.
These constant movements at plate boundaries result in various geological activities such as earthquakes, volcanic eruptions, and the formation of mountain ranges. It is important to note that while plate movement is driven by convection currents in the mantle, other factors like gravity and the shape of the Earth also contribute to plate motion.
In summary, the statement "They regularly move because of the convection currents of magma" is the correct one as it accurately explains how the movement of plates is driven by the convection currents in the Earth's mantle.