5. It is a complex network of many interconnected food chains and feeding relationships *
1 point
A. Food chain
B. food web
C food shortage
D. food supply
6. What terms refers to the community of living things interacting with their environment? *
1 point
A. Ecosystem
B. population
C. biotic
D. Abiotic
7. The following are actions or activities that help protect and conserve the estuaries and intertidal zone except ______________. *
1 point
A. Planting trees
B. disposing garbage properly
C . cleaning up the rivers
D. collecting starfish
8. Which of the following disrupts the balance of intertidal zone and estuary ecosystem? *
1 point
A. Planting marsh grass
B. Planting trees
C.proper waste management
D. Dynamite fishing
9. What causes the changing salinity of water in estuaries? *
1 point
A. The amount of sunlight
B. The hotness and coldness of water
C. The continuos flow of fresh and saltwater
D. The kinds of rocks found in the estuary
10. The partly enclosed coastal area at the mouth of the river where its freshwater mixes with salty water. *
1 point
A. open sea
B. estuary
C.middle Zone
D. intertidal zone
TRUE OR FALSE
11. Coral reefs are the natural habitat of tropical fishes *
1 point
TRUE
FALSE
12. Destruction of coral reefs may endanger the marine life. *
1 point
TRUE
FALSE
13. Coral reefs are the large underwater structure composed of the skeletons of colonial marine invertebrates called corals. *
1 point
TRUE
FALSE
14. Using net in fishing is a good practice to preserve our marine life. *
1 point
TRUE
FALSE
15.Selling of corals as souvenirs could be a threat to coral reefs. *
1 point
TRUE
FALSE​