| A | B |
|---|
| Carbon, hydrogen, oxygen and nitrogen equals | 99% of all organisms |
| you classify compounds as | organic and inorganic |
| inorganic | derived from nonliving things |
| water | most abundant inorganic compound |
| this is the most abundant in organisms and transports food, minerals and other substances | water |
| cytoplasim | made of materials dissolved or suspended in H2O |
| water's unique properties are | important for organisms |
| polar compound | one side has a negative charge and the other side is a positive charge |
| H2 and O2 bond so that the electrical charge is __________________ | unevenly distributed |
| When H2 and O2 bond is unevenly distributed | O is slightly negative and H is slightly positive |
| In a polar compound, H2O is an effective solvent because | most polar molecules and ionic compounds dissolve in H2O. |
| most polar molecules and ionic compounds dissolve in H2O ______________ | attracted to positive and negative charges...pulling them apart |
| Hydrogen bond | type of attraction holding 2 H2O together - weak bond - allows H2O to cling to itself |
| cohesion | attractive force between particles of same kind - surface tension |
| adhesion | attractive force between unlike substance |
| capillarity | move upward through narrow tubes against force of gravity |
| temperature moderation | H2O must gain or lose large amounts of energy for its temperature to change |
| heat | breaks bonds between molecules first |
| heat helps maintain homeostasis ________________ | helps keep cells at an even temperature |
