Across
- 2. a group of individuals that actually or potentially interbreed in nature
- 4. the proportion of the incident light or radiation that is reflected by a surface
- 6. the time during which humans have had a substantial impact on our planet
- 7. a global ecosystem composed of biotic and abiotic factors
- 13. a social goal for people to co-exist on Earth over a long period of time
- 14. the variety of life on Earth, from genes and bacteria to ecosystems
- 15. when the environment becomes enriched with nutrients, increasing the amount of plant and algae growth
Down
- 1. the purposeful clearing of forested land
- 3. an organism that creates its own food or energy
- 5. the process that converts ammonia to nitrite and then to nitrate
- 8. an accumulation of partially decayed vegetation or organic matter
- 9. the production and discharge of something, especially gas or radiation
- 10. an organism of microscopic size
- 11. a response within a system that influences the continued activity or productivity of that system
- 12. an environment where an organism lives throughout the year or for shorter periods of time to find a mate