AP BIOLOGY

Detailed explanation-1: -Sound is acoustical energy transferred through matter. This transfer can be felt as variations in pressure or as the motion of particles. Air is compressible and less dense than water so animals on land sense sound more through variations in air pressure rather than in the motion of the air.

Detailed explanation-2: -Echolocation is a two-part process: the animal makes a sound, and the animal listens to the rebounding sound waves to identify where items are located. Animals like bats, dolphins, shrews, some whales and some birds all use sound-echolocation-to see in the dark.

Detailed explanation-3: -In animals, the vibrations travel to a part of the inner ear called the cochlea, which looks like a snail’s shell. It has tiny parts called hair cells, which look like a little series of hairs in a line, that help animals sense a certain range of sound.

Detailed explanation-4: -Every living creature can hear-but how? Whatever their shape and size, most living things are able to hear – although they do it in lots of different ways. Sounds are all around us – they travel through the air, water, and land. And for animals, and humans, to make sense of sounds, they have to reach the brain.

Detailed explanation-5: -Ears. We can detect sound using our ears. An ear has an eardrum inside, connected to three small bones. The vibrations in the air make the eardrum vibrate, and these vibrations are passed through the three small bones (called ossicles) to a spiral structure called the cochlea.