Across
- 3. Table / All of the elements arranged according to the number in each protons.
- 5. Electron / Electrons that are in the outer shell.
- 8. Wall / which strengthens the cell and provides support
- 10. Reaction / Process that changes one set of chemicals .
- 12. - Absorbing / reactions have products with more energy than the reactants
- 13. / ( Water Loving )Dissolves in water
- 14. / Anything that takes up space and has mass.
- 16. / The act of noticing and describing events or processes in a careful, orderly way.
- 18. / Very tiny particles.
- 19. / Where respiration take place to release energy
- 20. / Compounds made up of carbon, hydrogen, and oxygen atoms.
- 23. / Long molecule consisting of many similar building blocks.
- 26. / many substances such as salts, sugars, minerals and even gases can dissolve in it
- 28. Group / The variable is changed.
- 30. / Lipids that have a hydrophilic head and hydrophobic tail
- 32. Carbohydrates / Are polymers of simple sugar.
- 33. / ( water fearing )Repels water
- 35. Number / Number of protons plus the number of neutrons in an atom.
- 38. bond / A bond between two polar molecules
- 39. Permeable / It allows some substances to cross it more easily than others.
- 41. Variable / The things you change in an experiment.
- 44. / A substance formed by the chemical combination of two or more elements in definite proportions.
- 46. / attraction between the water molecules and molecules of other substances
- 47. / attraction between the individual water molecules
- 48. / Smallest unit of most compounds.
- 49. / A logical interpretation based on what scientist already know.
- 50. / An organized way of gathering and analyzing information about the world.
Down
- 1. / A pure substance consists entirely of one type of atom.
- 2. energy / chemical reactions that need some energy to make them start
- 4. Bonding / Sharing electrons.
- 5. / Factors that change during an experiment.
- 6. Experiment / You can only change one variable.
- 7. molecule / The opposite ends have opposite charges
- 9. / Large and varied group of biological molecules that are generally not soluble in water.
- 10. / Where most of the chemical reaction take place.
- 11. / Mostly polymers, built from monomers.
- 15. Number / Numbers of protons an atom contains.
- 17. / Atoms of the same element that differ in the number of neutrons they contain.
- 21. / Records of experimental observation.
- 22. / consists of one or more polypeptides.
- 24. Bonding / Losing or gaining electrons.
- 25. / is a atom or molecule in which the total number of electrons is not equal to the total number of protons.
- 27. / Contain the green pigment chlorophyII
- 29. / The protons and neutrons exist in a dense core.
- 31. / Small building-block molecules.
- 34. / controls the activities of the cell
- 36. - releasing / reactions have products with less energy than the reactants
- 37. Acids / Organic molecules with carboxylic and amino groups..
- 38. / An explanation for an observation that can be tested.
- 40. Experiment / An experiment where only one variable is changed.
- 42. Variable / The things you measure in an experiment.
- 43. Acids / Polymers of nucleotides.
- 45. / Electrons around the outside of atoms and are arranged in layers.