A fun way to learn the different vocabulary about water are the flashcards.
Flashcards can be used as a guessing name, as a taboo game and also to ask children for the words. The flashcards can also be made by the students or at least colored by them so they get involve with the material.
If you want children to create the flashcards, here are some vocabulary ideas and suggestions:
https://quizlet.com/14892681/water-flashcards/
Flashcards about landforms and water forms:
Click to access Land_and_Water_Form_Cards.pdf
Flashcards about nature:
Water project 