1. Temperature has a powerful effect on organisms in an ecosystem. There are organisms that can live
in extreme heat while others can thrive in a very cold temperature. How does temperature aflect the
balance of an ecosystem?
A. Influence the physiological function of organisms
B. Influence the psychological function of organisms.
C Influence the anatomical function of organism
D. Influence the habitual function of organism
2. Light originating from the sun is essential to life on earth. What will happen ifsunlight do not reach
the ecosystem?
A No respiration will occur. C No oxygen cycle will occur
B. No carbon cycle will occur D.No photosynthesis will occur
3. What are the needed components of an ecosystem in order to operate and sustain life in the given
environment?
A Air and Water
C. Temperature and Minerals
Sunlight and Soil D. All of the above
4.Oxygen in air is an essential gas needed by animals in an ecosystem. How is oxygen produced in the
air?
A Photosynthesis C. Respiration
B. Carbon- Oxygen cyde D. Water cyde
5. Why water, sunlight and air are essential factors in the ecosystem?
A. For decomposition process C. For photosynthesis
B. For growth and development D. All of the above
6. Which of the following choices indude ONLY abiotic components?
A. Sunlight, algae and temperature C. Fish, crabs, oxygen
B. Sunlight, soil and oxygen D. All of the above.
7. A biotic factor depends on abiotic factor
A True
C. Neither true nor false
B. False
D. None of the above
8. What are the differences between biotic factors and abiotic factors?
A. Biotic factors are living things and abiotic factors are nonliving things.
B. Biotic factors are nonliving things and abiotic factors are living things.
C Biotic and abiotic factors are both nonliving things
D. Biotic and abiotic factors are both living things.
9. Which of the following scenario shows an ecosystem affected by a change in abiotic factors?
A. Animals becomes extinct because of pollution.
B.Two animal are competing over a fresh kill.
C Birds eat the insects that bite the horse.
D. All of the above
10. Human activities have triggered a change in climate, soil, air, and water. Which of the following
poses a positive human impact on the ecosystem?
A. Excessive cutting of tress.
C. Uncontrollable quarrying and mining.
B. Use of solar and water energy
D. Throwing of garbage in the bodies of water.​