The time difference between the occurrences of two peaks is the period of the wave. The time difference between two consecutive black dots marked also gives the period of the wave. Generally, symbol ‘T’ is used to denote period in physics. Unit of measuring period is seconds (s).
The greatest cause of the worldwide loss of species is human activity. I think
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D. The digestive system breaks food down into the molecules that can be used in respiration.
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The ozone layer protects the Earth against most UVB coming from the sun. It is always important to protect oneself against UVB, even in the absence of ozone depletion, by wearing hats, sunglasses, and sunscreen. However, these precautions will become more important as ozone depletion worsens.
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pneumoconiosis
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Dermatosis is a condition of the skin, either genetic in nature and influenced by environmental conditions such as an initial infection/ contact dermatitis.
Atherosclerosis is a condition described by hardening of the arteries, affecting the heart. This is a chronic condition, caused by environmental factors (diet).
Caisson disease is an acute neurological condition that only occurs in deep sea divers, caused by a gas embolism that blocks a vessel and transportation of oxygen.