Teacher's guide for Changes
By: Elementary Science Study.
Contributors: Margulis, Lynn, 1938-; Elementary Science Study.
Edition: [Rev. and modified / by Mary S. Gillmor]. --
Publisher: Webster Division, McGraw-Hill
Published: 1968
Place of publication: St. Louis; Toronto
Language: eng
Number of pages: 26
Subjects: Biology -- Experiments.; Biology -- Study and teaching (Elementary); Microbiology.
Other titles: Changes.
Notes: The Changes unit was developed under the guidance of Lynn Margulis from the question "What happens to food if you leave it around?"