Ancient stories are filled with accounts of sea monsters, sunken civilizations, and other mysteries. While we have yet to discover Atlantis or mermaids, the uncharted depths of the world's oceans continue to provide new discoveries each year. Since oceans account for more than seventy percent of the surface of the Earth, there is a vast amount of unexplored areas on our planet. In fact, a mathematician that went back through the history of Oceanic exploration put the amount that we have explored at less than five percent of the total area of oceans. It is also no surprise that over ninety percent of Earth's living creature are found in that very body water as well. Since there is so much life that we did not realize existed, it might also be good to know that the largest and longest earth forms are found in the ocean. The Mid-Ocean Ridge is the longest chain of mountains in the world and almost entirely under water. It may not surprise you that there are also underwater rivers and lakes down there too. While many people think the tropical rainforests are keeping our us breathing oxygen, just about seventy percent of the world's oxygen supply comes from our ocean's marine plants and algae.

This collection of worksheets explores the diets, characteristics, and habits of many familiar ocean-dwelling animals. Each short reading passage is accompanied by two sheets of questions for students. Answer keys have been provided for each. Fun Fact: While oceans cover over 70% of the surface of the Earth, man has explored less than 5% of them.