Which statements accurately describe the aspects of plate tectonics that involve subduction and seafloor spreading? check all that apply.
1.)older crust is melted at subduction zones. 2.)oceanic crust is created at mid-ocean ridges. 3.)crust is created at the coastlines of continents. 4.)continents move due to seafloor spreading and subduction.
5.)crust is created as the mantle hardens under the lithosphere.

The correct answers are:

1.) Older crust is melted at subduction zones;

2.) Oceanic crust is created at mid-ocean ridges;

The mid-ocean ridges appear on places where there's a divergent plate boundary, which means that the plates are moving away from one another. Because the plates are moving away from one another, they live a gap between them and lot of cracks in the already thinner crust. The high pressure form the mantle manages to push upwards the magma very easily in those places, so the magma reaches the seafloor. As it reaches the seafloor, the magma cools off very quickly, thus creating new rocks, or rather new oceanic crust.

ON the subduction zones, one of the plates is moving bellow another plate. As that process goes on, the crust from the plate that is subducting reaches the mantle layer. As the crust reaches the mantle layer it starts to melt because of the high temperatures.

A, B.

Explanation:

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called