If the temperature changes in a chemical reaction, what has occurred?

a. energy was transferred
b. energy was created
c. there was no energy transfer
d. energy was destoryed

If a || b and e || f, what is the value of y ?

Which statement best describes what happens when molecular compounds melt

Need what is special about water as a compound? how does water regulate climate? what drives water evaporation?   why is the water vapor fresh water when it rises from the ocean? why might freshwater in the form of snow take longer to enter the water cycle again than liquid precipitation?   what is an aquifer? what role do people play in the water cycle? plz just answer as many as you can ! thx if you !