Read and understand each question carefully. Choose the letter of the correct answer then write your answers on your answer sheet.
1. Plants, animals and other organisms found in it affects the estuaries. What do we call them? A. Abiotic factors B. Biotic factors C. Decomposers D. Producers
2. Organisms that live in the intertidal zone are adapted to crashing waves and tidal changes. How do barnacles prevent being washed away? A. They cling tightly to rocks C. They open their shells B. Barnacles go with the waves D. They store much salt in their bodies
3. Which is not an abiotic factor of the environment? A. Number of predators C. temperature of water B. salinity of water D. type of soil
4. How does mangrove forest contribute to the estuaries? A. Protect coast from erosion caused by waves B. Protect coral reefs from silting C. Serve as breeding ground for different varieties of fish D. All of the above
5.what caused the change in salinity or of salt in water ? A.strong water current B.Low and high tides C.hotness and coldness of water D.continouous flow and freshwater and saltwater through the
6.why is it that the temperature of water change ? A.because of that the tides of amount of sunlight B.because of the wave C.Because of too much salinity D.Because of the type of soil
7.how do organisms exposed to air be able of prevent driying out ? A.they still completely their shells B.they move up to zone that have plenty of water C.organic feed of other organisms that are watery D.Organism store much water in their bodies
8.when is the intertidal zone covered with water ? A. At high tide B.At low tide C.During daytime hours D.During nighttime hours
9.Why do some organisms living in the intertidal zones burrow themselves into the sand ? A.So that they will not be carried away by the tides B.so that they can make bigger homes C.so that they can get more oxygen D.so that they can get more food
10.Why are estuaries important to our environment ? A.they provide homes for many species B.They serve as nursery areas for marine organisms C.Help filter pollutants in water D.All of the above
