Across
- 1. the sticking together of particles of the same substance
- 3. the regions of the surface, atmosphere, and hydrosphere of the earth occupied by living organisms
- 6. a molecule that can be bonded to other identical molecules to form a polymer.
- 9. any of a large group of organic compounds occurring in foods and living tissues and including sugars, starch, and cellulose.
- 10. particle a particle smaller than an atom
- 16. a substance that has a molecular structure consisting chiefly or entirely of a large number of similar units bonded together
- 17. a chemical substance that neutralizes alkalis
- 18. any of the distinct types of material of which animals or plants are made, consisting of specialized cells and their products.
- 19. a group of organisms living in the same place or having a particular characteristic in common.
Down
- 1. the smallest structural and functional unit of an organism
- 2. not consisting of or deriving from living matter
- 4. any of the class of soluble, crystalline, typically sweet-tasting carbohydrates found in living tissues
- 5. a biological community of interacting organisms and their physical environment.
- 7. a substance capable of reacting with an acid to form a salt and water
- 8. all the inhabitants of a particular town, area, or country
- 11. the basic unit of a chemical element
- 12. an individual animal, plant, or single-celled life form.
- 13. a part of an organism that is typically self-contained and has a specific vital function, such as the heart or liver in humans.
- 14. able to dissolve other substances.
- 15. relating to or derived from living matter.