PRE-TEST
Directions: Read and understand each statement carefully. Write the letter of the
correct answer on a separate sheet of paper,
1. Which area have "brackish water" which means they have a mixture of
saltwater and freshwater?
A. estuaries B. intertidal zones C. pond
D. river
2. Which of the following statement is TRUE about an estuary?
A. Do not change very often.
B. It can only be found in warm climate.
C. Plants and animals cannot survive in salt water.
D. Brackish water comes together at the river mouth.
3. What will happen to organisms when there is an abrupt change of water
temperature? It may cause
A. death to sea animals
C. a healthy environment
B. increase of population D. an unhealthy environment
4. Which of the following areas in the estuary that are filled with seawater
during high tides and drained during low tides?
A. coral reefs B. mangrove forests C.mud flats D. salt marshes
5. Which of the following is an area for migratory birds?
A. coral reefs B.mud flats C. rocky shores D. salt marshes
6. Which provide energy and nutrients to other organisms?
A. consumers B. decomposers c. herbivores D. producers
7. Which is a decomposer?
A. algae
B. bacteria
C. plankton
D. seaweeds
8. All of these are plants you might see in the intertidal zone, EXCEPT.
A. algae
B. bougainvillea C. kelp
D. seaweeds
9. How are intertidal and estuaries ecosystems affected by man's activities?
Human activities may
A. give a healthy environment
B. increase population of organisms
C. fertilize the estuaries and intertidal areas
D. cause harm and unbalanced of the ecosystern
10. Why estuaries are important? Because it
A. is surrounded by fresh and salt water
B. will not filter the sediments and pollutants
C. helps during storms and as exit points for floods
D. is a relationship between biotic (living factors) and abiotic (non-
living factors) in a place​