What happens when a sound wave moves from water to air?

Number and variety of living organisms includes genetic, species, and ecological types

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?

45 points how are people today being protected from tsunamis? earthquake data is analyzed to detemrine if a tsunami is likely, and if so, warnings are sent out. areas in tsunami risk zones are no longer heavily populated. radar is used to measure wave heights regularly. meteorologists study the winds to determine if wave heights will be large.