Fill in the blanks:Complete the following sentences by filling suitable words. 1. Profundal Zone beneath the zone where there is insufficient light for photosynthesis 2. After a heavy rain the water table will be (close to the surface) 3. As plants and animals , their remains sink to the bottom of the water 4. There are two kinds of lakes Oligotrophic and 5. In lakes, often the water is murky (cloudy) because favourable abiotic factors lead to high numbers of organisms 6. In winter often lakes covered in ice and snow, preventing atmospheric from dissolving with the water 7. Human sewage, animal wastes, decaying plant life , industrial waste (ex. Pulp mills) are the sources of organic solid wastes and it causes water . 8. The greater the amount of decaying matter,the greater the population of 9. Many pollutants from and aquatic ecosystems are carried to the oceans, where they spread out and become more diluted 10. All oils eventually enter the of fish, birds and Fayaz.panhwer@tsec.ca 2

Question

Fill in the blanks:Complete the following sentences by filling suitable words. 1. Profundal Zone beneath the zone where there is insufficient light for photosynthesis 2. After a heavy rain the water table will be (close to the surface) 3. As plants and animals , their remains sink to the bottom of the water 4. There are two kinds of lakes Oligotrophic and 5. In lakes, often the water is murky (cloudy) because favourable abiotic factors lead to high numbers of organisms 6. In winter often lakes covered in ice and snow, preventing atmospheric from dissolving with the water 7. Human sewage, animal wastes, decaying plant life , industrial waste (ex. Pulp mills) are the sources of organic solid wastes and it causes water . 8. The greater the amount of decaying matter,the greater the population of 9. Many pollutants from and aquatic ecosystems are carried to the oceans, where they spread out and become more diluted 10. All oils eventually enter the of fish, birds and Fayaz.panhwer@tsec.ca 2

Answer 1

1. Profundal Zone beneath the **limnetic** zone where there is insufficient light for photosynthesis.2. After a heavy rain, the water table will be **high** (close to the surface).3. As plants and animals **die**, their remains sink to the bottom of the water.4. There are two kinds of lakes: Oligotrophic and **Eutrophic**.5. In **eutrophic** lakes, often the water is murky (cloudy) because favorable abiotic factors lead to high numbers of organisms.6. In winter, often lakes are covered in ice and snow, preventing atmospheric **oxygen** from dissolving in the water.7. Human sewage, animal wastes, decaying plant life, industrial waste (ex. Pulp mills) are the sources of organic solid wastes, and this causes water **pollution**.8. The greater the amount of decaying matter, the greater the population of **decomposers** (or bacteria).9. Many pollutants from **terrestrial** and aquatic ecosystems are carried to the oceans, where they spread out and become more diluted.10. All oils eventually enter the **tissues** (or bodies) of fish, birds, and other organisms.

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