2, Classify the objects or materials given below as opaque, transparent ortranslucent and luminous or non-luminous:Air, water, a piece of rock) a sheet of aluminium, a mirror; a wooden board) aolythene,a CD) smoke, a sheet of plane glass) fog, a piece of red hotiron, an umbrella, a lighted fluorescent tube, a wall, a sheet of carbon paperthe flame of a gas burner, a sheet of cardboard, a lighted torch, a sheet ofcellophane, a wire mesh, kerosene stove, sĂźn, firefly, moon.

2, Classify the objects or materials given below as opaque, transparen

1.	2, Classify the objects or materials given below as opaque, transparent ortranslucent and luminous or non-luminous:Air, water, a piece of rock) a sheet of aluminium, a mirror; a wooden board) aolythene,a CD) smoke, a sheet of plane glass) fog, a piece of red hotiron, an umbrella, a lighted fluorescent tube, a wall, a sheet of carbon paperthe flame of a gas burner, a sheet of cardboard, a lighted torch, a sheet ofcellophane, a wire mesh, kerosene stove, sĂźn, firefly, moon.
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