GENESIS 1:10
 

And God called the dry land Earth, and the gathering together of the waters He called Seas. And God saw that it was good. [Genesis 1:10 NKJV]
 

God named the dry land “Earth.” He named the water that was gathered together “Seas.” God saw that this was good. [Genesis 1:10 ICB]

There was a time the earth was just a formless deep waters, void under darkness and God would not continue to call the huge mass of waters "Earth." Behold God saw it good to call only the dryland "Earth" after He separated the waters from it. And the gathering of the waters He would not call earth but "Seas."

The waters preferred to mix up with the earth. But when the waters cover the dryland, it should not be called "Earth" but "Floods." God made the waters under heaven to be called "Seas" not 'Floods.' Therefore, He set a bound for the floods under heaven that they no more turn to cover the earth. [Psalms 104:9]. It was when God separated the dryland from the waters He gave name to the dryland (Earth) first before He gave name to the waters (Seas) that had been in "Genesis 1:2." And it was when God separated the light from darkness He named the light (Day) first before He named the darkness (Night) that had been in "Genesis 1:2." And God saw good to keep them separated in each case.

The LORD sits as King upon the Flood (waters) that are above the firmament of heaven (Psalms 29:10); but He does not want flood under heaven. He approved the flood above the firmament of heaven, but not the flood under the heaven.

Bible Teacher:

It only appeared as the dry-Land from the waters, but it became the Earth in that which God called it. If the dry-Land was to be called according to how it appeared while the waters were separating from it, God could have called the dry-Land "Desert" or "Wilderness" after its dryness. Behold, God rather called the dry-Land "Earth" after its firmness and purpose.
 

Also, the waters that gathered together were not named "Sea" but "Seas." Though they be gathered together in one place, they were not singular or one number but divided/distinctive even in their being gathered together in one place. So they were not called "Sea" (Singular) but called "Seas" (plural), just as they were not made of "Water" but "Waters."

Commentaries:

The seas gradually became called Sea, as they lost their unique difference being together. A day comes when there shall be no more sea, as these seas and earth shall be removed with the associated heaven. However, a new earth and a new heaven shall be brought up by God, and only a single Sea of Living Waters of Life shall be found in them.

Bible Teacher:

Before the new earth comes, remember the old earth was once a new earth when it appeared out of the waters and was called Earth in the Bible under review. This Bible verse above contains an improved and reformed status of the state of the earth from when it was formless and void with darkness over the face of the deep. Here was a reevaluated update on the statusquo, when God had corrected the first failures, bad names, poor conditions, and devaluation, found over earth.
 

• 1. God changed the name of the earth from been called "Formless" or "Void" into being called this new name, "Earth."
   
• 2. God changed the name of the waters from been called "the deep" into being called this new name, "Seas."
   
• 3. God no longer saw things Chaotic when He saw them, but saw things Good and Harmonic. God was pleased with what He saw of them.
   

Like God here, you may have to work until you can satisfactorily rename your works from badworks to goodworks, from faulty works to excellent works, from poor performance to great performance.

Commentaries:

God saw it was good, meaning: 

• It was good for the Firmament to be as it is and to be called Heaven;
• It was good for the Dryland to be as it is and to be called Earth;
• It was good for the Waters to be as it is and to be called Seas.
   

What was not good but formless and void was later called "Flood" and "Face of the Deep under the darkness." The Word of God rebuked the Floods in establishing the heaven, the earth and the seas.