Answer the following questions-
Question: 1. Name two materials which are soluble in water.
Answer- Sugar and salt.
Question: 2. Name two transparent and two opaque materials.
Answer- Glass, acrylic sheet are transparent materials, while stone and wood are opaque materials.
Question: 3. What are metals?
Answer- The substance which is hard, has luster and is good conductor of heat and electricity is called metal.
Question: 4. What is transparent material?
Answer: 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?
(d) Iron filing
Answer: - (c) Glycerine
Question: 2. Which of the following is insoluble in water?
(b) Washing soda
(c) Lemon juice
Answer: - (a) Chalk
Question: 3. Which of the following is a soft material?
Answer: - (d) Chalk
Question: 4. Which of the following is a hard material?
Answer: - (d) Diamond
Question: 5. Which of the following can float on water?
(a) Iron pin
Answer: - (b) Wood
Question: 6. Which of the following materials would sink in water?
(a) Steel spoon
(b) Piece of wood
Answer: - (a) Steel spoon