The vertical displacement of the wave is measured from the

equilibrium to the crest and is called the frequency
crest to the trough and is called the amplitude
trough to the trough and is called the wavelength
equilibrium to the crest and is called the amplitude

Many animals cannot sweat to maintain a stable body temperature. what is one other way animals can cool down?

Which blood cell spend most of their time in the lymphatic system?

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.