Sodium hydroxide dissolving in water is a _____________ change.
Hydrocholic acid reacting wuth potassium hydroxide to produce a salt, water and heat is a ___________ change.
Water heating and turning into steam is a ___________ change.
Iron rusting is a ___________ change.
Milk souring is a ____________ change.
Blue color is a ______________ property.
Density is a ____________ property.
Flammability is a _______________ property.
Combustion (reactivity with oxygen) is a ______________ property.
Melting point is a ____________ property.