class 8 science please help
Answers
Explanation:
1 i elephant , ii bat , iii dolphin
2 Noise pollution impacts millions of people on a daily basis. The most common health problem it causes is Noise Induced Hearing Loss (NIHL). Exposure to loud noise can also cause high blood pressure, heart disease, sleep disturbances, and stress. These health problems can affect all age groups, especially children.
3 Loud speakers
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Answer:
14.1 - Several animal species are able to hear frequencies well beyond the human hearing range. Some dolphins and bats, for example, can hear frequencies up to 100,000 Hz. Elephants can hear sounds at 14–16 Hz, while some whales can hear infrasonic sounds as low as 7 Hz
14.2 - Noise pollution impacts millions of people on a daily basis. The most common health problem it causes is Noise Induced Hearing Loss (NIHL). Exposure to loud noise can also cause high blood pressure, heart disease, sleep disturbances, and stress. These health problems can affect all age groups, especially children.
14.3 - Over the last few years, things have become very noisy. Whether you can hear construction work going on in full swing outside, children’s playing and giggling outside, your neighbour’s loud music or perhaps you can hear almost everything your neighbour is doing. The truth is, even when home we are constantly bombed by loud noises that disturbs our everyday life.
It doesn’t end there; do you know noise is an underestimated threat that can cause a number of serious health issues for humans. Noise beyond a perimeter can be a reason for, stress, hypertension, increased vulnerability to forgetfulness, insomnia, depression, heart diseases and many other serious ailments.
The noisy atmosphere in which we are living is a huge obstacle to securing good health