Answer the following questions-
Question: 1. Name two materials which are soluble in water.
Sugar and salt.
Question: 2. Name two transparent and two opaque materials.
Glass, acrylic sheet are transparent materials, while stone and wood are opaque materials.
Question: 3. What are metals?
The substance which is hard, has luster and is good conductor of heat and electricity is called metal.
Metals
Question: 4. What is transparent material?
The material which allows light to pass through it is called transparent materials.
Multiple choice questions-
Question: 1. Which of the following is soluble in water?
(a) Sand
(b) Oil
(c) Glycerine
(d) Iron filing
Correct Answer is option (c)
Question: 2. Which of the following is insoluble in water?
(a) Chalk
(b) Washing soda
(c) Lemon juice
(d) Sugar
Correct Answer is option (a)
Question: 3. Which of the following is a soft material?
(a) Iron
(b) Glass
(c) Dimond
(d) Chalk
Correct Answer is option (d)
Question: 4. Which of the following is a hard material?
(a) Chalk
(b) Wool
(c) Cotton
(d) Diamond
Correct Answer is option (d)
Question: 5. Which of the following can float on water?
(a) Iron pin
(b) Wood
(c) Steel
(d) Coin
Correct Answer is option (b)
Question: 6. Which of the following materials would sink in water?
(a) Steel spoon
(b) Piece of wood
(c) Pencil
(d) Toothbrush
Correct Answer is option (a)
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1. What is sorting of materials into groups? |
2. Why is it necessary to sort materials into groups? |
3. What are the different ways of sorting materials into groups? |
4. How can sorting of materials into groups help in recycling? |
5. What are the benefits of sorting of materials into groups? |
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