| A | B |
|---|
| acid | a compound usually having a sour taste |
| conservation | the careful utilization of a natural resource in order to prevent depletion |
| biology | the science of life or living matter |
| zoology | the science or branch of biology dealing with animals |
| cell | the basic structual unit of all organisms |
| delta | nearly flat plain between diverging branches of the mouth of a river |
| herbivore | a living thing that eats only plants |
| energy | any source of usable power |
| astronomy | the science that deals with the universe beyond earth's atmosphere |
| ecology | the branch of biology that deals with the relations and interactions between organisms and their enviornment, including other organisms |
| pulley | a simple machine that consists of a wheel and axle |
| fulcrum | the support, or point of rest, on which a lever turns in moving a body |
| coefficient | a number that is constant for a given substance, body, or process |
| hurricane | storm of the most intense severity |
| tornado | a localized, violently destructive windstorm occuring over land |
| heredity | the transmission of genetic characters from parents to offspring |
| comet | a celestial body moving about the sun, usually in a highly eccentric orbit |
| enzymes | any of numerous proteins or conjugated proteins produced by living organisms |
| physics | the science that deals with matter, energy, motion, and force |
| photosynthesis | the process green plants use by which carbohydrates are synthesized from carbon dioxide and water using light as an energy source |
