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Across 5. refers to plants, animals, and other living things that have not been domesticated. 7. branch of biology that deals with the relations of organisms to one another and to their physical surroundings 8. An animal that hunts, kills, and eats other animals 12. a self-contained living system. 13. an animal that eats only plants for food. 14. an animal that usually eats dead animals and rarely kills its own prey. 16. the substances are able to be broken down by microorganisms into simple, stable compounds such as carbon diox- ide, water, and minerals. 21. is the controlled biological decomposition of organic materials. It is another form of recycling. 23. the sequence in which living things in a community get their food. 24. all of the organisms that live in a given area. 25. the process of bringing living things under the control of humans. 26. a specially created place where solid waste is buried in layers and covered with soil. 27. means to make less of.

Down 1. is the liquid resulting from solid waste drippings that may contaminate surface or groundwater. 2. an animal that eats both plants and animals for food. 3. means to use a product more than once in its same form for the same or different purpose. 4. is a way of showing how food chains in a community are connected. 6. is an open hole in the ground where waste is thrown. 9. means to make something into a new product so that it can be used again. 10. which is a product of waste decomposition, produced by the landfill is flared and released into the atmosphere or is converted into an energy resource. 11. a group of interacting populations living together in the same environment. 15. is using worms to recycle food waste into valuable fertilizer (plant food). 17. occurs when something naturally decays or breaks down into smaller parts. 18. symbolizes the continuous circle of recycling. 19. carnivore 20. waste material produced by people that does not include liquids, hazardous wastes, and nonsolid materials. 22. the physical area in which a wildlife species lives in natural conditions.