Why is there a pop sound when a burning splint is extinguished in a test tube filled with hydrogen gas?
why does hydrogen burn with a pop sound?

Which are forms of frozen water? check all that apply. dew frost hail rain sleet

How are the terms group and period used on the periodic table

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 !