Question 1. Rearrange the boxes given below to make a sentence that helps us understand opaque objects.
Question 2. Classify the objects or materials given below as opaque, transparent or translucent and luminous or 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, a piece of red hot iron, an umbrella, a lighted fluorescent tube, a wall, a sheet of carbon paper, the flame of a gas burner, a sheet of cardboard, a lighted torch, a sheet of cellophane, a wire mesh, kerosene stove, sun, firefly, moon.
Answer:-
| Object | Opaque | Transparent | Translucent | Luminous | Non-luminous |
| Air | – | Yes | – | – | Yes |
| Water | – | Yes | – | – | Yes |
| Piece of rock | Yes | – | – | – | Yes |
| Sheet of aluminium | Yes | – | – | – | Yes |
| Mirror | Yes | – | – | – | Yes |
| Wooden board | Yes | – | – | – | Yes |
| Sheet of polythene | – | – | Yes | – | Yes |
| CD | – | – | Yes | – | Yes |
| Smoke | – | – | Yes | – | Yes |
| Sheet of plane glass | – | Yes | – | – | Yes |
| Fog | – | – | Yes | – | Yes |
| Piece of red hot iron | Yes | – | – | Yes | – |
| Umbrella | Yes | – | – | – | Yes |
| Lighted fluorescent tube | Yes | – | – | Yes | – |
| Wall | Yes | – | – | – | Yes |
| Sheet of carbon paper | Yes | – | – | – | Yes |
| Flame of a gas burner | – | – | Yes | Yes | – |
| Sheet of cardboard | Yes | – | – | – | Yes |
| Lighted torch | Yes | – | – | Yes | – |
| Sheet of cellophane | – | – | Yes | – | Yes |
| Wire mesh | – | – | Yes | – | Yes |
| Kerosene stove | Yes | – | – | Yes | – |
| Sun | Yes | – | – | Yes | – |
| Firefly | Yes | – | – | Yes | – |
| Moon | Yes | – | – | – | Yes |
Question 3. Can you think of creating a shape that would give a circular shadow if held in one way and a rectangular shadow if held in another way?
Answer:- Yes, a cyclinder or a circular disc when held in one way give a circular shadow and a rectangular shadow if held in another way.
Question 4. In a completely dark room, if you hold up a mirror in front of you, will you see a reflection of yourself in the mirror?
Answer:- In a completely dark room no image will be formed as there will be no reflection of light.
Click on the Chapter’s Link to get PDF of all Chapters of NCERT of Science Class 6
Get NCERT Solutions for Class 6 Science Here
- Chapter 1 Food: Where Does it Come From?
- Chapter 2 Components of Food
- Chapter 3 Fibre to Fabric
- Chapter 4 Sorting Materials into Groups
- Chapter 5 Separation of Substances
- Chapter 6 Changes Around Us
- Chapter 7 Getting to Know Plants
- Chapter 8 Body Movements
- Chapter 9 The Living Organisms Characteristics and Habitats
- Chapter 10 Motion and Measurements of Distances
- Chapter 11 Light, Shadows and Reflections
- Chapter 12 Electricity and Circuits
- Chapter 13 Fun with Magnets
- Chapter 14 Water
- Chapter 15 Air Around Us
- Chapter 16 Garbage in, Garbage out