Periodic Assessment-II/Half Yearly Exam-2025-2026 SGRR Public School Science Time: 2½ Hrs.] Class: 8 Μ. Μ.: 80 General Instructions: (i) Attempt all the questions. (ii) Internal choice is given. (iii) Handwriting should be neat & clean. (iv) Diagram should be well-labelled. 1. Multiple Choice questions: 5×1-5 (a) Animals whose numbers are diminishing to level that they might face extinction is known as: (1) Endemic (ii) Endangered (iii) Extinct (iv) Fauna (b) Which of the following does not reduce friction? (1) Streamlined shape. (ii) Lubricant (ii) Sand (iv) Soil (c) The term used for the process of separation of grains from chaff by blowing air: (i) Sieving (ii) Winnowing (iii) Threhing (iv) Hand picking (d) What is the minimum temperature at which a substance catches five and burns on its own: (i) Boiling point (ii) Melting point (ii) Ignition temperature (iv) Freezing point (e) The wear and tear in the machine part is due to: (i) Electrostatic force (ii) Muscular force (i...