Characteristics reading passages with worksheets and a test. Seven pages of text that explains each characteristic. There are plenty of examples and graphics that illustrate each concept. The last section of the text is about the needs of living things. Included is a two page worksheet and a 20 question test. Excellent for upper elementary middle school or a great review for resource high school. It would also make a great reading in the science content assignment. Answer keys for the worksheet and test is provided.