Question

2. Classify the objects or materials given below as opaque, transparent
Air, water, a piece of rock, a sheet of aluminium, a mirror, a wooden board,
sheet of polythene, a CD, smoke, a sheet of plane glass. fog, a piece of red ha
iron, an umbrella, a lighted fluorescent tube, a wall, a sheet of carbon paper
translucent and luminous or non-luminous:
the flame of a gas burner, a sheet of cardboard, a lighted torch, a sheets
cellophane, a wire mesh, kerosene stove, sun, firefly, moon.

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Answer 1

Explanation:

2. Classify the objects or materials given below as opaque, transparent

Air, water, a piece of rock, a sheet of aluminium, a mirror, a wooden board,

sheet of polythene, a CD, smoke, a sheet of plane glass. fog, a piece of red ha

iron, an umbrella, a lighted fluorescent tube, a wall, a sheet of carbon paper

translucent and luminous or non-luminous:

the flame of a gas burner, a sheet of cardboard, a lighted torch, a sheets

cellophane, a wire mesh, kerosene stove, sun, firefly, moon.

Answer 2

Answer:

Opaque: A piece of rock, a sheet of aluminium, a mirror, a wooden board, a CD, an umbrella, a wall, a sheet of carbon paper, a sheet of cardboard.

Transparent: Air, water, a sheet of plane glass.

Translucent: A sheet of polythene, smoke, fog, a sheet of cellophane, a wire mesh.

Luminous: A piece of red hot iron, a lighted fluorescent tube, the flame of a gas burner, a lighted torch, sun, firefly, kerosene stove.

Non – luminous: Air, water, a piece of rock, a sheet of aluminium, a mirror, a wooden board, a sheet of polythene, a CD, smoke, a sheet of plane glass, fog, an umbrella, a wall, a sheet of carbon paper, a sheet of cardboard, a sheet of cellophane, a wire mesh, kerosene stove, moon.