Biology

4. The regions of Earth where living organisms exist
8. A process that changes solar energy into chemical energy
9. A measure of the amount of energy or biomass transferred from one trophic level to the next higher trophic level
12. Rain,snow,or fog that is naturally acidic due to gases in the atmosphere that react with water to form acids
13. A terrestrial ecosystem that is land-based
16. A chemical that is essential to living things and is cycled through ecosystems
18. A process in which materials, especially toxins, are ingested by an organism at a rate greater than they are eliminated
20. Atmospheric gases that prevent heat from leaving the atmosphere, thus increasing the temperature of the atmosphere
21. The warming of Earth as a result of greenhouse gases, which trap some of the energy that would otherwise leave Earth
22. The nonliving parts of an ecosystem

1. A process in which nutrient levels in aquatic ecosystems increase, leading to an increase in the populations of primary producers
2. An ecosystem that is capable of withstanding pressure and giving support to a variety of organisms
3. ALL the water found on Earth, including lakes, oceans, and groundwater
5. Aquatic ecosystem an ecosystem that is water- based, either freshwater or saltwater
6. The living parts of an ecosystem
7. A category of organisms that is defined by how the organisms gain their energy
10. The total mass of living organisms in a defined group or area
11. A process that releases energy from organic molecules, especially carbohydrates, in the absence of oxygen
14. The hard part of Earth’s surface
15. The layer of gases above Earth’s surface
17. All the interacting parts of a biological community and its environment
19. A process that releases energy from organic molecules, especially carbohydrates, in the presence of oxygen