What is the cause of discoloring of Taj Mahal

Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass

One similarity and one difference between an element and a mixture of elements

Match the term to its description match term definition chemical energy a) internal energy caused by vibrations of atoms and molecules electrical energy b) electromagnetic energy that travels in waves radiant energy c) the movement of an electrical charge thermal energy d) potential energy stored in the bonds between atoms