MULTIPLE CHOICE. Choose the letter of the correct answer.


1. ________is any substance which causes harmful effects or uneasiness in the

organisms

a. pollution

b. pollutant

c. compounds

d. minerals


2. Which type of pollutant remains in the form in which they were added to the environment?

a. persistent pollutant

c. primary pollutant

b. non-persistent pollutant

d. secondary pollutant


3. Which type of pollutant remains consistent in the environment for a long period of time

without any change in its original form?

a. persistent pollutant

c. primary pollutant

b. non-persistent pollutant

d. secondary pollutant


4. Which of the following is an effect of burning of fossil fuels to human health?

a. kidney problems b. asthma

c. lung cancer

d. all of these


5. The process by which a body of water becomes enriched in dissolved nutrients as

phosphates that stimulate the growth of aquatic plant life usually resulting in the

depletion of dissolved oxygen is known as _________.

a. algal bloom

c. biological magnification

b. eutrophication

d. thermal pollution


6. Which of the following will result to soil pollution?

a. fertilizers

b. pesticides

c. solid wastes

d. all of these


7. The recommended intensity of sound for indoor according to WHO is _______

a. 30 dB

b. 40 dB

c. 50 dB

d. 60 dB


8. ______________pollution is the type of pollution caused on account of the release of

radioactive substances or radiations in the environment.

a. radioactive

b. land

c. noise

d. air


9. When harmful substances build up in the air to unhealthy levels, it is called

a. smog

b. primary pollutant c. secondary pollutant

d. air pollution


10. Which is NOT a harmful change?

a. pollute the water b. cut down trees

c. plant flowers

d. pollute the

air​