Answer:
1.Sea floor sediment provide an invaluable key to past climate change. Finely varved sediments from areas of rapid deposition provide a high-resolution record of past climate variation, and volcanic ash layers contribute to the comprehensive study of climate change on relatively short timescales.
2.Because the seafloor is only expanding in the Atlantic. In the Pacific, the sea floor is subducting, meaning it is going underground. This is how tectonic plates and geological activity work here on Earth. ... Therefore, the planet is not getting bigger because its surface is constantly recycling itself.
Explanation:
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