1. Which of the following does NOT belong to the abiotic factors that affect the organisms in estuaries?
A. sand
B. sunlight
c. temperature
D. waves

2. What is an estuary? An estuary is a nursery of the
A. beach
B. fish
C. flora
D. sea

3. What causes the changes of salinity of water in estuaries?
A. amount of sunlight
C. kinds of rocks found in the estuary B. hotness and coldness of water
D. continuous flow of fresh and saltwater

4. What type of plant will grow in saltwater areas?
A. bamboo
B. coconut
C. mangroves
D. seaweeds

5. What strong forces that living organisms must learn to live with and it refers to the movement of the surface of the water?
A. salinity
B. sunlight
C. temperature
D. waves

6. What do you call the relationship between biotic and abiotic factors in a certain place?
A. brackish
B. ecosystem
C. intertidal zone
D. subtidal zone

7. What place provides habitat to both marine animals and birds?
A. brackish
B. intertidal zone
C. salty water
D. waves

8. Which phrase best describes the brackish water? Brackish water is the
A. mixture of salt and sand
B. place of marine animals
C. mixture of saltwater and freshwater D. place where saltwater and freshwater meet
9. You went on a one-week vacation with your family in the farm, you left your aquarium with lots of fish at home, you unplug all the electricity as you go. As you came back you found out that all of the fishes died. What do you think happens to them? The fishes died because they lack
A. oxygen
B. sunlight
C. temperature
D. water

10. Which word gives the correct meaning of the abiotic?
A. Estuarine
B. Intertidal Zone
C. Living things
D. Non-living things​