What I Know Directions: Read the questions carefully and choose the letter of the best
answer. Write your answer in your science activity notebook.
1. The introduction of materials into the atmosphere which produces
adverse effects especially to humans and their daily activities is known
as
A air pollution
B. soll pollution
C. thermal pollution
water pollution
2. Increasing population, vehicles, and the growing number of factories
and establishments are the main contributing factors of
A. erosion
B. extinction
C. pollution
D. population
6. What will happen to organisms when there is sudden change in
temperature beyond their limits?
A. Organisms will die.
B. Organisms will survive.
C. Some organisms will be harmed and may result to death
D. Some organisms may eventually adapt to the environment.
7. The following are abiotic factors that may affect the population of
organisms EXCEPT:
A drought
B. earthquakes
dar
predators
D. typhoons
8. What is the result when there is overproduction of nitrates, phosphates
and potassium in the soil?
100
The soil becomes dry
The soil becomes acidic.
C. The soil becomes fertile.
D. The soil becomes humus
9. Which of the following is NOT a natural disturbance to the abiotic
components in an ecosystem?
A. earthquake
B. landslide
C. quarrying
D. typhoon
10. Which of the following is a man-made disturbance to the abiotic
components of an ecosystem?
A. disease
B. earthquake
C. mining
D. wildfire
11. What will happen to the organisms when there is water pollution?
A. Organisms will die
B. Organisms will survive.
C. Some organisms will be harmed and may result to death
D. Some organisms may eventually adapt to the new environment.
12. What is considered as a major environmental disturbance to the abiotic
components of an ecosystem?
A. earthquake
B. flood
C. landslide
D. wildfire
3. The following are diseases from infectious organisms carried by the
water EXCEPT:
A. amoebiasis
B. arteriosclerosis
C
cholera
D. dysentery
4. The following are effects when abiotic factors changes on the
ecosystem EXCEPT:
A. air pollution
B. toxic chemicals
C. water pollution
D. death to living organisms
5. Which of the following is NOT a man-made activity that increases the
atmospheric heat?
A. burning
B. deforestation
C. dumping of waste
D. reforestation