What happens to the sound wave in echolocation? Olt releases energy
O It is reflected
O It is refracted
O It is absorbed

__can be defined as which velocity changes

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.

Why is the melting of ice a physical change ?