Which statements describe the cyclic nature of seafloor spreading? continents are created. new oceanic crust is created. volcanoes erupt and produce more crust. old crust is destroyed at subduction zones. old crust is pushed away from oceanic ridges

The correct answers are:

- New oceanic crust is created;

At a divergent plate boundary, the plates are moving away from each other, thus living a space between them. That space is filled in by the magma penetrating from the mantle layer, and as it cools off it creates the new oceanic crust.

- Old crust is destroyed at subduction zones;

The newly formed crust is pushing the old crust away at the edges. When the old crust comes into a situation to be at a convergent boundary, it will start subducting, thus go into the mantle layer and get destroyed.

- Old crust is pushed away from oceanic ridges;

The new crust formed at the oceanic ridges is building on mass and size constantly, so it is pushing the old crust away towards the edges of the plates.

D. logic

Explanation:

Logic has sometimes been defined as an art. It has been called the art of correct thinking. The difference between a science and an art is that one has to do with knowing and the other with doing. Obviously the two are closely re lated. To carry on any kind of work successfully one must have considerable knowledge. He must know the character of the thing with which he is working and he must under stand the laws that have to do with its use. Some scientific knowledge is a prerequisite for any of the arts. On the other hand most if not all of our scientific knowledge can be used for the accomplishment of some purpose. The correct use of knowledge for the achievement of some end may properly be called an art.