Across
- 2. smallest unit of most compounds
- 4. basic unit of matter
- 6. educated guess
- 7. atoms of the same element that differ in the number of neutrons they contain
- 9. organized way of using evidence to learn about the natural world
- 10. any compound that makes up H+ ions in solution
- 11. the process of gathering information about events in an orderly way
- 14. indicates the concentration of H+ ions in a solution
- 15. positive and negative charged atoms
- 18. small particles of RNA and protien
- 20. small organelles filled with enzymes
- 22. help for growth and repair
- 24. a mixture of one or more solutes dissolved in a solvent
- 25. control center of the cell
- 26. pure substance that consits of one type of atom
- 27. the substance being dissolved
- 29. substance formed by the combination of two or more elements
- 33. stores water and food
- 35. a group of similar cells that perform a particular function
- 37. diffusion of water
- 39. the science that employs the scientific method to study living things
- 40. when electrons are shared between atoms
- 41. the information gathered from observations
- 42. change food into energy
- 43. portion of the cell outside the nucleus
Down
- 1. make up RNA and DNA
- 3. make up sugars and starches
- 5. a process that changes ar transfers one set of chemicals into another
- 8. little organs
- 12. capture sunlight and turn it into energy
- 13. means above strength
- 16. many groups of tissue that work together
- 17. where particles move from high to low
- 19. fats, oils and waxes
- 21. smallest unit of life
- 23. the tendency toward a realitively stable equlibruim
- 28. a state in which opposing forces are balanced
- 30. also known as the plasma membrane
- 31. negative charge
- 32. means below strength
- 34. a strong supporting layer around the cell membrane
- 36. means same strength
- 38. the substance in which the solute disolves