Seven continents: Asia (Eastern Hemisphere, Northern Hemisphere)? Europe (Eastern Hemisphere, Northern Hemisphere)? Africa (Eastern Hemisphere)? North America (western hemisphere, northern hemisphere)? South America (western hemisphere, southern hemisphere)? Oceania?

Antarctica (the southern hemisphere of the earth, in Antarctica)

Four oceans: Atlantic Ocean? Pacific Ocean? Arctic Ocean (the northern hemisphere of the earth, in the Arctic)? the Indian Ocean