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Untitled 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Across Down 3. The ____ ocean is the largest and has the greatest average depth. 1. The three major regions of the ocean floor include continental margins, mid-ocean ridges, and ocean _____ floor. 4. ____are long, narrow depressions formed in the deepest parts of the ocean where plates plunge back into the mantle 6. Isolated volcanic peaks on the ocean floor are called ____. 8. _______ collect data about areas of the ocean that were previously unreachable by humans and can stay under water for long periods of time. 2. _____ ooze is an example of biogenous sediment. 5. ___ sediments consist primarily of mineral grains that were eroded from rocks on land. 7. Manganese _____ are hard lumps of manganese and other metals that precipitate around a smaller object. 9. Approximately 70% of Earth’s surface is covered by _______? 12. The continental margin in the Pacific Ocean includes volcanic activity, ______, and plate interaction. 10. The three types of ocean floor sediments include terrigenous, _____, and hydrogenous sediment. 13. ___ is one type of technology scientists use to measure ocean depth. 11. The four major oceans include the pacific, Atlantic, Indian, and ______. 14. Manganese nodules are an example of ____ sediment. 15. ___ and natural gas are the main energy products currently being obtained from the ocean floor. 17. Approximately 30% of Earth’s surface is covered by _______? 16. The continental margin includes continental slope,continental rise. and continental _____.