LIVING THINGS

Chapter 1 Key Terms

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Across 1. the factor the scientist changes in an experiment 3. organisms that make their own food 6. an experiment in which all factors are identical except one 8. a living thing 10. an organism whose cell lacks a nucleus and some other cell structures 12. the process of change that produces a more complex organism 14. single-celled 15. an organism with cells that contain nuclei and other cell structures 16. a change in an organism's surroundings that causes it to react 17. a group of similar organisms that can mate and reproduce fertile offspring in nature 18. the maintenance of stable internal conditions despite changes in the surroundings 19. an action or change in behavior as a result of a stimuls

Down 2. the naming system for organisms in which each organism is given a two-part name 4. organisms that cannot make their own food 5. a classification grouping that contains similar, closely related organisms 6. the process of grouping things based on their similarities 7. many-celled 9. the scientific study of how living things are classified 11. basic unit of structure and function in an organism 13. the process by which species gradually change over time

The look has changed! Some of the puzzles that people list for the public get indexed by the search engines (like Google). Some people find those puzzles and cannot figure out how to make a puzzle of their own. So this page now has the navigation sidebar.

Use the "Printable HTML" button to get a clean page, in either HTML or PDF, that you can use your browser's print button to print. This page won't have buttons or ads, just your puzzle. The PDF format allows the web site to know how large a printer page is, and the fonts are scaled to fill the page. The PDF takes awhile to generate. Don't panic!