1	3	5
Organization	Little or no topic organization, development, details. Less than two examples of systems or no concluding sentence.	Adequate details. Reasonable flow. At least two examples of systems. Article ends with a concluding sentence.	Topic details richly developed: Introductory sentence defines systems. Supporting sentences give three examples of systems. Topic is restated as a concluding sentence.
Mechanics	Errors in vocabulary. Surface features seriously interfere with communication.	Acceptable vocabulary. Some errors in mechanics, but do not interfere with communication.	Complete sentences, proper capitalization, punctuation, spelling. Effective and rich language.
Science Content	Less than two examples fit the definition of systems. Components not correctly identified.	At least two examples fit the definition. Components of examples correctly identified.	Examples fit the definition. Components and sub components of examples correctly specified.