What is a mixture of hot gasses and volcanic material that moves at highspeeds

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

If two objects at different te, peraure are in contact with each other what happens to their temperature

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 !