Respuesta :
Densities
Explanation:
The force which is responsible for an object to float over a liquid is the buoyancy force and it depends on the density of the liquid and the object which means that the object’s density should be less compared to the liquid density to float over the water
In case of birds such as ducks, geese, and swans, they have greater densities than water, yet they are able to sit on its surface because they have special glands which secretes oil
The secretion of oil makes their feathers oily and hence they can shed the water on feathers and feathers in turn do not get wet
These birds can then float easily on water by their webbed feet and larger surface tension of water
Surface tension is the elastic tendency of the surface of the fluid that makes it acquire the least surface area possible
Birds like ducks, swans and geese possess some of the unique features, which helps them to afloat on the water surface. These birds do not possess the tendency to sit on the soapy water.
What are the adaptations made by birds to stay on the water surface?
Some of the birds like geese, ducks, and swans possess special glands, which secrete oil that they discharge in the water. This prevents the feathers from getting wet, and due to the presence of webbed feet and larger surface tension of water, they remain afloat on the surface of the water.
On the other hand, the same birds fail to sit on the soapy water as the surface tension of the water is less and soap washes the oily feather, which enhances the weight of the bird. This makes the bird to sink.
Thus, some of the unique features and presence of oil glands and surface tension of the water makes the birds to sit on the surface of the water.
Find out more information about adaptations of birds here:
https://brainly.com/question/16865787
