Worksheet Solutions: Materials Around Us - 2 | Science for Class 6 PDF Download

State True/False

(i) Opaque is a materials through which you are not able to see. 
Ans: True

(ii) Soft materials can be compressed or scratched. 
Ans: True

(iii) Brick is opaque, while butter paper is translucent. 
Ans: True

(iv) All gases are non–lustrous. 
Ans: True

(v) Iron is harder than sponge. 
Ans: True

(vi) Air is transparent. 
Ans: True

(vii) Diamonds, gems and pearls are lustrous.
Ans: True

(viii) Diamond is the hardest natural occurring substance. 
Ans: True.

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Fill in the Blanks

(i) Grouping things together with similar properties is called                        .
Ans: Sorting/Classification

(ii)                is the metal that exists in liquid state.
Ans: Mercury 

(iii)                       is a soft metal that can be cut with a knife.
Ans: Potassium

(iv) Iodine is a               that has lustre.
Ans: non-metal

(v) A piece of stone is a                     material.
Ans:  hard

(vi) Oily patch on a piece of paper is               .
Ans: translucent

(vii) Materials that have lustre are usually called as             .
Ans: metal.

(viii) Materials are grouped on the basis of                    or                 in their properties.
Ans: similarities , dissimilarities 

(ix) Based upon transparency, materials can be grouped as                  ,                 and              .
Ans: opaque , transparent , translucent

(x) A substance which is used in making different objects is called                    .
Ans: material

Short Questions Answers

Q3: Name a substance through which light can pass through partially but one cannot see through it clearly.
Ans: Translucent.

Q4: Name a liquid which is lustrous?
Ans: Amongst the liquids, mercury is the lustrous.

Q5: Name two non-metals which are lustrous?
Ans: Graphite and Iodine crystals.

Q6: Name any two things which can be made out of wood?
Ans: Table and Chair.

Q7: Write the object from the following which shine: brick, earthen pitcher, glass bowl, plastic table, steel spoon, cotton bed sheet, newspaper.
Ans: glass bowl and steel spoon.

Q8: Name one lustrous material?
Ans: Aluminium.

Q9: Which material is generally used for making pens?
Ans: Plastic or Metal.

Q10: Write any two objects made up of opaque materials?
Ans: Wooden doors and steel plate.

Q11: Write two things made from leather.
Ans: belt and hand-bag.

Q12: Write name of any three metals.
Ans: Iron, Aluminium and Copper.

Q13: Name few things made up of plastic.
Ans: cups, plates, toys, buckets, baskets.

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Assertion and Reason Questions

Q14: Assertion (A): Wood is a good conductor of heat.
Reason (R): Substances which do not allow heat to pass through them are called poor conductors of heat.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true. 
Ans: (d) Wood is a poor conductor of heat.

Q15 Assertion (A): The materials which can be compressed or scratched easily are called soft.
Reason (R): Iron is a hard material.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true. 
Ans: (b)