1. what percent of the earth’s surface is covered by oceans? how did you calculate this percentage?

71% of the earths surface is covered by oceans
You can calculate this by figuring out the percent of land there is and subtracting it by 100 and you should get 71%

Quizlet has the answer

Answer: the philippines has suffered from an inexhaustible number of deadly typhoons, earthquakes, volcano eruptions and other natural disasters. this is due to its location along the ring of fire, or typhoon belt – a large pacific ocean region where many of earth's volcanic eruptions and earthquakes occur.