science

1. Natural substances that are not replenished at the speed at which they are consumed.
4. The processes through which the three main rock types transform from one into another.
8. The continuous circulation of water in the Earth-atmosphere system.
9. The process in which deep, cold water rises toward the surface.
11. The movement of particles through a substance, transporting heat from hotter to cooler areas.
12. A vertical cross-section of the soil, made of layers running parallel to the surface.
13. A population in which the allelic frequencies of its gene pool do not change through successive generations.
14. A resource that can be replenished naturally over time.

2. The study of organisms and how they interact with their environment.
3. The introduction of harmful materials into the environment
5. The capacity for doing work
6. A biogeochemical process through which nitrogen is converted into various forms, constantly passing from the atmosphere to organisms and back.
7. The radiation from the Sun capable of producing heat, causing chemical reactions, or generating electricity.
10. A printed or computerized device that aids in the identification of biological entities.
13. Water released from clouds in the form of rain, freezing rain, sleet, snow, or hail.