When stomach acid helps to break down food into smaller particles this is an example of a change.*
O Physical
Chemical
O
Elemental
о
Atomic

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

Which metal exist in liquid state and can be cut with knife ?

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 !