1. The largest ocean is the Pacific Ocean.
2. The largest country by area is Russia.
3. The longest river is the Nile River.
4. The highest mountain is Mount Everest.
5. The deepest ocean trench is the Mariana Trench.
6. The largest desert is the Antarctic Desert.
7. The largest lake by surface area is the Caspian Sea.
8. The largest island is Greenland.
9. The largest peninsula is the Arabian Peninsula.
10. The largest coral reef system is the Great Barrier Reef.
11. The largest rainforest is the Amazon Rainforest.
12. The largest waterfall by volume is Inga Falls.
13. The largest volcano is Mauna Loa.
14. The largest canyon is the Grand Canyon.
15. The largest glacier is the Lambert Glacier.
16. The largest hot spring is the Grand Prismatic Spring.
17. The largest geyser is Steamboat Geyser.
18. The largest cave system is Mammoth Cave.
19. The largest salt flat is Salar de Uyuni.
20. The largest sand dune is Dune 7.
Parent Tip: Review the logic above to help your child master the concept of last call at the oasis worksheet answers.