EARTH in OT usually stands for one or other of the Heb. words 'eretz and 'ad
In the beginning God created the heavens and the earth.
And God said, Let the waters swarm with swarms of living creatures, and let birds fly above the earth in the open firmament of heaven.
And Jehovah God formed man of the dust of the ground, and breathed into his nostrils the breath of life; and man became a living soul.
O earth, earth, earth, hear the word of Jehovah.