Matter Around Us

Samacheer Book Back Questions And Answers For Science Standard 6 Term 1 “Matter Around Us“

I. Choose the correct answer:
1. _____ is not made of matter
(a) Gold ring
(b) iron nail
(c) light ray
(d) oil drop

2. 200 ml of water is poured into a bowl of 400ml capacity. The volume of water now will be _____
(a) 400 ml
(b) 600 ml
(c) 200 ml
(d) 800 ml

3. Seeds from water-melon can be removed by _____ method.
(a) Hand-picking
(b) filtration
(c) magnetic separation
(d) decantation

4. Lighter impurities like dust, when mixed with rice or pulses, can be removed by _____.
(a) filtration
(b) sedimentation
(c) decantation
(d) winnowing

5. _____ of is essential to perform winnowing activity
(a) Rain
(b) Soil
(c) Water
(d) Air

6. Filtration method is effective in separating _____ mixture.
(a) solid – solid
(b) solid – liquid
(c) liquid – liquid
(d) liquid – gas

7. From the following _____ is not a mixture
(a) Coffee with milk
(b) lemon juice
(c) Water
(d) ice cream embedded with nuts.

II. State whether the following statements are True or False. If false give the correct statement:
1. Air is not compressible.
2. Liquids have no fixed volume but have fixed shape.
3. Particles in solids are free to move.
4. Then pulses are washed with water before cooking, the water is separated from them by the process of filtration.
5. Strainer is a kind of sieve which is used to separate a liquid from solid
6. Grain and husk can be separated by winnowing
7. Air is a pure substance
8. Butter from curds is separated by sedimentation.

Answers:
1. False (Air is Compressible)
2. False (Liquids have no fixed shape but have fixed volume)
3. False (Particles in solids are not free to move)
4. False (When pulses are washed with water before cooking, the water is separated from them by the process of Decantation)
5. False (Strainer is a kind of sieve which is used to separate a solid from liquid)
6. True.
7. False (Air is a mixture)
8. False (Butter from curds is separated by churning process)

III. 1. Match the following:
Property                              Example
1. Breaks easily (brittle)           A. Metal pan
2. Bends readily                       B. Rubber band
3. Can be stretched easily       C. Cotton wool
4. Gets compressed easily       D. Mud pot
5. Gets heated readily             E. Plastic wire

Answers:
1. D
2. E
3. B
4. C
5. A

2. Match the following:
1. Separation of visible undesirable components – water mixed with chalk powder – Magnetic Separation
2. Separating of heavier and lighter components – sand and water – Decantation
3. Separation of insoluble impurities – iron impurities – Filtration
4. Separation of magnetic component from non-magnetic components – rice and stone – Hand picking
5. Separation of solids from liquids – husk and paddy – Winnowing

Answers:
1. Separation of visible undesirable components – rice and stone – Hand picking
2. Separating of heavier and lighter components – husk and paddy – Winnowing
3. Separation of insoluble impurities – water mixed with chalk powder – Decantation
4. Separation of magnetic component from non-magnetic components – iron impurities – Magnetic Separation
5. Separation of solids from liquids – husk and paddy – Filtration

IV. Fill in the blanks:
1. Matter is made up of _____
2. In solids, the space between the particles is less than in _____
3. Grains can be separated from their stalks by _____
4. Chillies are removed from ‘upma’ by _____ method.
5. The method employed to separate clay particles from water is _____
6. Among the following items: Safety pins, pencil and rubber band, _____will get attracted to a magnet.
7. Water obtained from tube wells is usually _____water

Answers:
1. Atoms
2. An Liquids
3. Threshlng
4. Hand picking
5. Filtration
6. Safety pins
7. Impure

V. Complete the given analogy:
1. Solid: rigidity:: gas: _____
2. Large Inter-particle space: gas:: _____ : solid
3. Solid: definite shape:: _____ : shape of the vessel.
4. Husk-grains: winnowing:: Sawdust-chalk piece: _____
5. Murukku from hot oil: _____ :: coffee powder residue from decoction
6. Iron-sulphur mixture: _____ :: Mustard seeds from Urad-dhal: Rolling

Answers:
1. Compressibility
2. Little inter-particle space
3. Liquids
4. Sedimentation and Decantation
5. Hand picking; Filtration
6. Magnetic Separation

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