Whales use their lower jawbone to the middle ear. whereby they can ear clearly while they are in the water. Human ears and dolphins ears they work the same . They receive sound directly from the air.
In similar way dolphins and human ears are placed in basic anatomical location which is same as on the head. Without a medium hearing is not possible.
The medium sound for human is air. Sound travels 343 meters per second in air and 147 meters per second in water. The most effective way of transmitting sound waves is through water.
We can say that the sound will be fast to travel in medium if the molecules are closer.
Oceanic crust is continuously being created at mid-ocean ridges<span>. As plates diverge at these </span>ridges<span>, magma rises into the upper mantle and crust. As it moves away from the </span>ridge<span>, the lithosphere becomes cooler and denser, and sediment gradually builds on top of it.</span>
Proteins such as enzymes have active sites that are complementary to that of the shape of the substrates,allowing chemical reactions to occur.However,high temperatures causes the hydrogen bonds in the protein to break down,change structure and lose its active site.Hence,the three-dimensional shape of the protein is no longer complementary to that of the substrate and no enzyme-substrate is form,resulting in no chrmical reactions to occur.