The Bottom of the Sea
The sea floor has many mountains, plains, deep valleys, and even volcanoes! Its mountain ranges are longer and wider than those on land. Its valleys are longer and deeper, too.
The earth’s surface is covered with a rocky crust. The high parts are the continents and islands, and the low parts are under the sea. The deepest parts are long, narrow valleys called trenches. Earth’s deepest trench is almost 11 kilometres deep in one spot.
Large mountains rise from the sea floor. In some places, they rise high enough to appear above the water. Many of these mountains are volcanoes. Hawaii is made up of volcanic islands.
Great mountain ranges in the oceans are called ridges. Iceland is part of a ridge in the middle of the Atlantic Ocean. Smaller ridges are found in the Pacific Ocean.
Isn’t it surprising that you can find all of these different kinds of land at the bottom of the sea?
Picture Credit : Google