Across
- 3. The by-products of photosynthesis are carbohydrates and __________.
- 6. __________ in the atmosphere are fixed by bacteria.
- 8. During __________ clouds are formed, water vapor in the air is changed into liquid water, and tiny water droplets formed on even tinier dust, salt, or smoke particles, which act as a nucleus.
- 11. __________ soil is dark in color, soft, dry and crumbly; has a tight hold on water and plant food; air moves freely between particles.
- 12. Raw materials of photosynthesis include water, sunlight and __________.
- 14. All of the population in a given area.
- 17. A grouping of ecosystems with similar abiotic and biotic conditions
- 18. A relationship between two organisms from different species in which one organism depends on the other for food or some other benefit with the latter getting harmed but not killed.
- 20. What do you call the process of accumulating higher and higher doses of insecticides like DDT through the food chain, which eventually affect the reproduction of birds of prey?
- 22. If the population of predator increases, the population of the __________ decreases.
- 23. Flash flood, hurricanes and tsunami are DENSITY __________ limiting factors.
- 24. All living things and their physical environments within a particular area.
- 26. An ecological relationship between two organisms from different species in which one benefits and the other is unaffected, no benefit nor harm.
- 29. The differences seen in the beaks of different species of finches are most likely the result of VARIATION and __________.
- 31. The process wherein plants use nitrogen in the form of nitrates is called __________.
- 34. The layer of the atmosphere nearest to the earth is the __________.
- 38. In order for a biogeochemical cycle to function properly __________ must be recycled continually.
- 39. An organism’s habitat, resource use, and fundamental role in the community.
- 40. Nutrients necessary for organisms are repeatedly recycled between air, water, soil, rock and water cycles. Which law supports this statement? THE LAW OF CONSERVATION OF __________.
Down
- 1. In early spring, many wildflowers begin to grow, produce flowers, and release seeds. The leaves of the wildflowers make food before the leaves of the trees in the area begin to develop. The early growth pattern of the wildflowers would likely result in decreased competition for __________ between the trees and the wildflowers.
- 2. The circulation of nutrients through the atmosphere, also called NUTRIENT CYCLE, is called __________ CYCLE.
- 4. Nitrifying bacteria converts ammonium to __________.
- 5. Maple leaf beetles and willow leaf beetles are named for the type of tree where they live and reproduce. They look identical to each other when observed, but experiments have shown that willow beetles would starve before eating maple leaves. This is an example of specialization that would directly reduce __________.
- 7. Heat from the sun get to Earth by __________, using electromagnetic waves to transfer the heat.
- 9. A relationship between two organisms from different species in which both organisms benefit.
- 10. What is the most complex level in the level of organization of life?
- 13. Zebra mussels, an __________ species that is pushing local species of freshwater shellfish to extinction, that were introduced to the Great Lakes can be controlled by continuous low level chlorination of the service water during the entire reproductive season of the mussel.
- 15. __________ is a water reservoir that is formed when rainfall infiltrates downward and stored in spaces and fractures beneath the Earth.
- 16. __________ are necessary in a food chain because they return nutrients to the ecosystem.
- 19. Plants get their nutrients from the __________.
- 20. Widespread use of pesticides and clear-cutting of forests would cause the greatest reduction in the __________ of a large ecosystem.
- 21. It is the maximum number of individuals a given area can support indefinitely.
- 25. __________ carries warm water to western South America and causes the surface water in the eastern Pacific Ocean to become warmer.
- 27. An organism that eats both plants and meat or animals is called an __________.
- 28. The removal of trees and other vegetation impact an environment by increasing erosion __________.
- 30. The thin layer of gases that surrounds the earth.
- 32. The members of a species that live in the same area.
- 33. An ecological relationship wherein individuals of one species hunt, capture, and feed on individuals of another species.
- 35. It is the natural, orderly, and predictable change of a biological community over time.
- 36. The most likely explanation for showing fewer organisms at each feeding level going up the pyramid is that some energy is lost to the environment as __________.
- 37. __________ carries cold water to western South America.