World Oceans Day

Question 1: What percentage of the Earth's surface is covered by oceans? <br />Question 2: Which ocean is the largest and deepest in the world? <br />Question 3: What is the name of the phenomenon by which ocean water circulates around the globe, driven by differences in temperature and salinity? <br />Question 4: Which marine mammal, known for its distinctive black and white coloring and playful behavior, is the largest member of the dolphin family? <br />Question 5: What is the name of the international treaty, first signed in 1959, that sets aside Antarctica and its surrounding waters as a scientific preserve and bans military activity...