Uses experiments to explain ecosystems, life cycles, and interactions of life and environment including pollution and conservation.
"synopsis" may belong to another edition of this title.
In the ``Science Experiments for Young People'' series, some disappointing experiments on ecosystems, life cycles, pollution, and conservation. Though simple household materials are employed and the authors give plentiful warnings, procedures, observations, and things to try, few of the experiments follow scientific method. Some are merely observations (``What kinds of animals can you find under a log or rock?'') or definitions (``What is Indoor Pollution?''). Multiple variables are not always adequately controlled, and some conclusions are puzzling. In ``Do Plants Use Carbon Dioxide?'' the authors use three samples to test five variables: more samples and controls are needed, and the experiment doesn't prove either that the resulting gas is oxygen or that the gas is a result of photosynthesis. A hot topic, but poorly explored. Index. (Nonfiction. 10-12) -- Copyright ©1993, Kirkus Associates, LP. All rights reserved.
"About this title" may belong to another edition of this title.
Seller: Better World Books, Mishawaka, IN, U.S.A.
Condition: Very Good. Pages intact with possible writing/highlighting. Binding strong with minor wear. Dust jackets/supplements may not be included. Stock photo provided. Product includes identifying sticker. Better World Books: Buy Books. Do Good. Seller Inventory # 4571542-6
Seller: Better World Books, Mishawaka, IN, U.S.A.
Condition: Good. Former library copy. Pages intact with minimal writing/highlighting. The binding may be loose and creased. Dust jackets/supplements are not included. Includes library markings. Stock photo provided. Product includes identifying sticker. Better World Books: Buy Books. Do Good. Seller Inventory # GRP60892184