References

1. "Teaching Chemistry with Toys." Sarquis, Sarquis and Williams, Terrific Science Press, 1995.
2. "How Science Works." J. Hahn, Dorling Kindersley, London, 1991. ISBN 0-7621-0249-7
3. "Science for Children." 3rd ed., Williard J. Jacobsen, Abby B. Bergman, Prentice Hall, New Jersey, 1991.
4. "Teaching Physical Science Through Children’s Literature." Grentz, Portman, Sarquis, Terrific Science Press, 1996.
5. "How Weather Works," Michael Allaby, Reader’s Digest, Dorling Kindersley Limited, 1995.
6. "Science Is . . . A Resource Book for Fascinating Facts, Projects, and Activities." S. Bosak, Scholastic Canada, 1998.
7. Information supplied with the water cycle model.