 | Hemisphere with the most water |
| Percent of water surface area |
| Percent of water in the oceans |
| Average depth of the ocean (in meters) |
| Definitions of scientific hypothesis, theory and law |
| First purely scientific expedition |
| First expedition to use an echo sounder |
| Latitude lines; 0 degrees latitude; 90 degrees latitude |
| Longitude lines; 0 degrees longitude |
| Age of the Earth |
| When and where life originated |
| Most abundant element |
| The galaxy we are in; where in that galaxy is Earth located |
| Who developed idea of a spherical Earth |
| Greek concept of "oceanus" |
| Definition of planet, star and galaxy |
| What is meant by "Big Bang" |
| Where did water in the oceans come from |
| Age of the universe |
| Process by which Earth's crust and core formed |
