How can people change a beach? is a change or harmful?

Barbara is converting 78°f to degrees celsius. first, she subtracts 32 from 78. what is the next step?

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

Which of the following is a consequence of urban heat islands? increased precipitation downwind of the city? increased precipitation upwind of the city? decreased winds within the city? increased winds within the city?