The part of earth's rocky outer layer that makes up the floor of the ocean basins is the

The given blank can be filled with oceanic crust.

Explanation:

The oceanic crust refers to the comparatively thin section of the Earth's crust that forms the floor of the ocean basins. In terms of geology, the oceanic crust is comparatively young than the oceanic crust and comprises basalt rock covered by sediments.  

The thickness of the oceanic crust is about 4 miles, and it comprises many layers, not involving the covering sediments. The uppermost layer, of approximately 500 meters thickness, comprises the lavas formed of basalt.  

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.