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Ecological Balance
7
soil erosion:_____causes important elements, like nutrients in the topsoil to be removed.
oxygen: when ____ is not available in the air people and animals will die.
deforestation: removing the elements that make up a forest is called ____.
trees: people cut ____ to obtain wood and make lumber.
forest: ____ are important because they help keep what is known ecological balance.
floods: _____ may occur because dead roots may release their hold of the water in the soil.
scientist: ______have found out that many tropical rain forest depend very much on decomposers growth.
Ecological Balance
Across:2. | people cut ____ to obtain wood and make lumber. | 4. | ____ are important because they help keep what is known ecological balance. |
| 6. | _____ may occur because dead roots may release their hold of the water in the soil. | 7. | removing the elements that make up a forest is called ____. |
| | Down:1. | when ____ is not available in the air people and animals will die. | 3. | ______have found out that many tropical rain forest depend very much on decomposers growth. |
| 5. | _____causes important elements, like nutrients in the topsoil to be removed. |
| |
© 2012
PuzzleFast.com, Noncommercial Use Only
Ecological Balance
Across:2. | people cut ____ to obtain wood and make lumber. | 4. | ____ are important because they help keep what is known ecological balance. |
| 6. | _____ may occur because dead roots may release their hold of the water in the soil. | 7. | removing the elements that make up a forest is called ____. |
| | Down:1. | when ____ is not available in the air people and animals will die. | 3. | ______have found out that many tropical rain forest depend very much on decomposers growth. |
| 5. | _____causes important elements, like nutrients in the topsoil to be removed. |
| |
© 2012
PuzzleFast.com, Noncommercial Use Only