Write NP if the activity tells about noise pollution, PF if it shows a
pollution-free environment, and CNP if it is a way of controlling noise
pollution. Write your answer on the space provided before each number

1. A police car switched on the siren while chasing the criminal.

2. A brand-new motorcycle has a tight silencer in its exhaust that produces a
soft engine sound.

3. A helicopter is flying at a low altitude that passes our school.

4. In the monastery, every part of it has always signages to observe silence.

5. At the church, we cannot hear disturbing sounds.
6. In the middle of the jungle, you can hear nothing but the birds chirping.

7. At the disco party, people dance to deafening music.
8. At home, curtains reduce sounds of the appliances and other noise.

9. In an acoustic room, the walls and ceiling are built to minimize the sound.

10. Cats when mating are screaming like they are fighting for real but it's only
a gesture of mating.​