Class 6 Science Chapter 6 Extra Questions and Answers Materials Around Us
NCERT Class 6 Science Chapter 6 Materials Around Us Important Extra Questions and Answers
Question 1.
List any five objects and write the names of materials they are made up of.
Answer:
| Object | Material it is made up of |
| 1. Table | Wood |
| 2. Spoon | Steel |
| 3. Spectacles | Glass, steel and plastic |
| 4. Book | Paper |
| 5. Toys | Plastic and rubber |
Question 2.
Name any four objects which can be made from wood.
Answer:
Table, chair, stool and door.
Question 3.
Group the objects given below on the basis of hardness/ softness:
Earthen lamp, wooden scale, pencil, tennis ball, screw driver, wool, wax, eraser, sharpener, soap.
Answer:
| Hard objects | Soft objects |
| Earthen lamp | Tennis ball |
| Wooden scale | Wool |
| Pencil | Wax |
| Screw drivfer | Soap |
| Sharpener | Eraser |
Question 4.
Select those objects from the following which have lustre: Steel bowl, cotton shirt, glass bowl, brass lamp, bell, soap cake
Answer:
Steel bowl, brass lamp and bell have lustre.
Question 5.
List any four materials which can be used to make a spoon.
Answer:
Steel, brass, wood and plastic can be used to make a spoon.
Question 6.
Can a cricket ball be used to play tennis?
Answer:
Cricket ball cannot be used to play tennis because it is heavy and has low bounce.
Question 7.
Which of the following objects can be classified as soft?
Chalk, chair, brick, wax, wool, steel bowl and sponge
Answer:
Chalk, wax, wool and sponge are soft.
Question 8.
What are transparent materials? Give two examples of transparent objects.
Answer:
The materials through which the things can be seen clearly, are called transparent. For example, glass and water.
Question 9.
Name three materials which are soluble in water and three which are insoluble.
Answer:
Sugar, salt and washing soda are soluble in water. Sand, sawdust and wax are insoluble in water.
Question 10.
What are opaque materials? Give two examples of opaque objects.
Answer:
Materials, through which we are not able to see at all, are called opaque. For example, metal sheet and wooden board.
Question 11.
Which of the following liquids are soluble in water and which are insoluble? Honey, mustard oil, alcohol, kerosene, mnegar and petrol.
Answer:
Honey, alcohol and vinegar are soluble in water. Mustard oil, kerosene and petrol are insoluble in water.
Question 12.
State whether the statements given below are True (T) or – False (F)
(i) Chalk dissolves in water
(ii) Spoon is opaque, while glass is transparent
(iii) Sand settles down in water
(iv) Oil is insoluble in water
(v) Glucose is insoluble in water
Answer:
(i) Chalk dissolves in water (F)
(ii) Spoon is opaque, while glass is transparent (T)
(iii) Sand settles down in water (T)
(iv) Oil is insoluble in water (T)
(v) Glucose is insoluble in water (F)
Question 13.
Oxygen gas is soluble in water. It dissolves in water present in various water bodies. What is the importance of this oxygen gas dissolved in water?
Answer:
Oxygen gas, dissolved in water, is important for the survival of animals and plants that live in water.
Question 14.
Match the objects given below with ‘the materials from which they could be made.
| Object | Materials |
| Chair | Leather |
| Book | Plastic |
| Toy | Paper |
| Tumbler | Wood |
| Shoes | Glass |
Answer:
| Object | Materials |
| Chair | Wood |
| Book | Paper |
| Toy 1 | Plastic |
| Tumbler | Glass |
| Shoes | Leather |
Question 15.
Give the units in which mass and volume are measured.
Answer:
Mass is measured in units of gram (g) and kilogram (kg) The units to measure volume are litre (L), millilitre (mL) and cubic metre (m3).
Question 16.
Why is water considered as matter?
Answer:
Water is considered as matter because it has mass and occupies space.
Question 17.
Name a material which is transparent and is not visible.
Answer:
Air
Question 18.
Which is heavier, 1 L of water or 1 L of sand?
Answer:
1 L of sand is heavier than 1 L of water.
Question 19.
Why does a piece of wood float on water?
Answer:
Wood floats on water because it is lighter than water.