地球主要的海洋面积约3.61亿平方千米,占地表总面积的70.8%;陆地面积约1.49亿平方千米,占地表总面积的29.2%。地球表面大部分由海洋覆盖着,地球也因此被称为“蓝色星球”。在浩瀚的洋底,绵延着巨大的洋中脊。洋中脊的两侧对称分布着神奇的海底磁条带,记录着地球的秘密。地球年龄的记录者现在的研究证明,地壳是逐渐冷却而成 The main marine area of ​​the earth is about 361 million square kilometers, accounting for 70.8% of the total land surface area; land area of ​​about 149 million square kilometers, accounting for 29.2% of the total surface area. Most of the Earth’s surface is covered by the ocean, so the Earth is also called “Blue Planet.” In the vast ocean floor, stretches a huge mid-ocean ridge. On both sides of mid-ocean ridge symmetrical distribution of the magical sea magnetic stripes, recording the secret of the Earth. Current records of earth age studies have shown that the crust is gradually cooling