4. Which materials are said to be hard?.
5. What do you understand by solubility?
D. Short Answer Type Questions
1. What should be kept in mind while choosing a material to make an object?
2. Why can we not use wood to make utensils?
3. Rubber is not used to make electric wires. Why?
4. List any five properties that can be used to group various objects around us.
5. What is transparency?
E. Long Answer Type Qu
1. What is classificati y classification of objects necessary?
2. Describe an actis .o show that objects can be grouped on the basis of their solubility in water
3. Describe an a vity to show that objects can be grouped on the basis of transparency.
4. Differentiate between:
(a) Lustrous and nonlustrous objects
(b) Magnetic and nonmagnetic objects
(c) Transparent, trasllcent and opaque objects
HOTS Questions
1. To play hide and seek, you hide behind a pole or a car, not behind a glass window, why?
2. On the basis of which common property would you like to group these objects, and wh
(a) Book, sand, a metal key, sponge, leaf. cork, an eraser and an iron nail
(b) Sugar, salt, apple, chair, orange, table, flowervase, fan and biscuit
Answers
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Biology is the natural science that studies life and living organisms, including their physical structure, chemical processes, molecular interactions, physiological mechanisms, development and evolution. Despite the complexity of the science, certain unifying concepts consolidate it into a single, coherent field.
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