Scientists tell us that billions of years ago the earth was a ball of bare, sizzling-hot rock, with no air or water on it. The outside of the earth slowly cooled, but the inside stayed fiercely hot. Volcanoes roared and rumbled, throwing out tons of melted rock and enormous clouds of hot gases. One of these gases was steam-water so hot it is gas. When steam cools it turns into water.
Some scientists think the steam rose up in clouds. When these clouds cooled, they became water that fell as rain. Slowly, the low parts of the earth's rocky crust filled up with water, forming the ocean.
Other scientists think the steam cooled as it came out of the earth. When it became water, it trickled downhill. During many millions of years, the low places filled up to form the ocean.
Whichever way it happened, the ocean was formed by steam from inside the earth-steam that cooled and became water.
Some scientists think the steam rose up in clouds. When these clouds cooled, they became water that fell as rain. Slowly, the low parts of the earth's rocky crust filled up with water, forming the ocean.
Other scientists think the steam cooled as it came out of the earth. When it became water, it trickled downhill. During many millions of years, the low places filled up to form the ocean.
Whichever way it happened, the ocean was formed by steam from inside the earth-steam that cooled and became water.
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