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SACRED HEART CONVENT HR. SR. SECONDARY SCHOOL, UNIT TEST, CLASS: VIII, SUBJECT: PHYSICS, TIME: 1 Hr, MM: 20, SECTION – A, 1. Which of the following will expand more, when heated to the same temperature?, a) Solid, , b) Liquid, , c) Gas, , 2. The increase in length of a metal rod depends on, a) The initial length of the rod only, , b) the rise in temperature only, , c) The material of rod only, , d) All the above three factors, , 3. The space between molecules is the least in__________., 4. The increase in volume of a solid is______., 5. Alcohol expands _____than water., 6. _______ (Evaporation/ Boiling) is a slow process., 7. Water does not have a fixed coefficient of cubical expansion.[T/F], 8. Kerosene contracts on heating. [T/F], 9. Temperature of a liquid rises during boiling or vaporization.[T/F], 10.The coefficient of linear expansion, superficial expansion and cubical expansions are related, as:-, , SECTION – B, Answer the following questions:, 1), 2), 3), 4), 5), , Give any two real life examples of thermal expansion., Distinguish between evaporation and boiling., On what factors does linear expansion depend?, Why do bubbles appear when a liquid is heated?, A cubical metal solid block is heated. How will its volume change?
