Across
- 1. mixture of water and nondissolved materials
- 3. compound with an amino group on one end and a carboxyl group on the other end
- 7. energy needed to get a reaction started
- 8. a logical interpretation based on prior knowledge or experience
- 9. material composed of two or more elements or compounds that are physically mixed together but not chemically combined
- 12. process by which a single parent reproduces by itself
- 15. bond formed when one or more electrons are transferred from one atom to another
- 16. the variable that is observed and that changes in response to the manipulated variable
- 17. single sugar molecule
- 19. a slight attraction that develops between the oppositely charged reions of nearby molecules
- 20. negatively charged particle; located outside the atomic nucleus
- 22. protein that acts as a biological catalyst
- 24. formed by the chemical combination of two or more elements in definite proportions
- 26. devices that produce magnified images of structures that are too small to see with the unaided eye
- 28. compound that forms hydrogen ions (H+) in solution
- 29. containing hydrogen, oxygen, nitrogen, carbon, and phosphorus
- 32. an organized way of using evidence to learn about the natural world
- 35. compound that produces dydroxide ions (OH+) in solution
- 37. idea that life could arise from nonliving matter
- 38. monomer of mucleic acids made up of a 5-carbon sugar, a phosphate group, and a nitrogenous base
- 39. measurement system used to indicate teh concentration of hydrogen ions (H+) in solution
- 40. group of cells grown in a nutrient solution from a single original cell
- 41. element or compound that enters into a chemical reaction
- 43. an experiment in which only one variable is changed at a time
- 46. large macromolecule formed from monosaccharides
- 48. a signal to which an organism responds
- 50. process by which organisms maintain a relatively stable internal environment
- 53. technique in which cells are broken into pieces and the different cell parts are separated
- 56. well-tested explanation that unifies a broad range of observations
- 57. small unit that can join together with other small units to form polymers
- 58. atom of an element that has a number of neutrons different from that of other atoms of the same element
- 60. information gathered from observations
Down
- 1. process by which cells from two different parents unite to produce the first cell of a new organism
- 2. a decimal system of measurement whose units are based on certain physical standards adn are scaled on multiples of 10
- 4. process that changes one set of chemicals into another set of chemicals
- 5. substance that is dissolved in a solvent to make a solution
- 6. set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
- 10. a proposed scientific explanation for a set of observations
- 11. variable that is deliberately changed in a controlled experiment
- 13. basic unit of all forms of life
- 14. the science that employs the scientific method to study living things
- 16. single-stranded mucleic acid that contains the sugar ribose
- 18. bond formed by the sharing of electrons between atoms
- 21. nucleic acid that contains the sugar deoxyribose
- 23. basic unit of matter
- 24. microscope that allows light to pass through a specimen and uses two lenses to form an image
- 25. the process of gathering information about events or processes in a careful, orderly way
- 27. weak acid or base that can react with strong acids or bases to help prevent sharp, sudden changes in pH
- 30. attraction between molecules of the same substance
- 31. microscope that forms an image by focusing beams of electrons onto a specimen
- 33. substance that speeds up the rate of a chemical reaction
- 34. large compound formed from combinations of many monomers
- 36. smallest unit of most compounds
- 39. element or compound produced by a chemical reaction
- 42. compound made up of carbon, hydrogen, and oxygen atoms; major source of energy for the human body
- 44. the center of the atom which contains the protons and neutrons
- 45. atom that has a positive or negative charge
- 47. rectant of an enzyme-catalyzed reaction
- 49. macromolecule made mainly from carbon and hydrogen atoms; includes fats, oils, and waxes
- 51. mixture of two or more substances in which the molecules of the substances are evenly distributed
- 52. substance in which a solute is dissolved to form a solution
- 54. substance consisting entirely of one type of atom
- 55. attraction between molecules of different substances; in plants, attraction between unlike molecules
- 59. macromolecule that contains carbon, cydrogen, oxygen, and nitrogen; needed by the body for growth and repair and to make up enzymes