Chap 15 : Our Environment www.cbse.online File Revision Date : 7 July 2019 CHAPTER CHAPTER 1515 CBSE Objective Questions Exam 2019-2020 CLASS : 10th SUB : Science For 15 Years Exams Chapter-wise Question Bank visit www.cbse.online or whatsapp at 8905629969 Our Environment 1. OBJECTIVE QUESTIONS 7. CO2 absorbs some of the ......... that radiates from the surface of earth to space (a) ozone (b) heat 1. Sulphur dioxide affects (c) food web (d) producer (a) haemoglobin of blood (b) Arteries Ans : (b) heat (c) Alveoli of lungs (d) Nerves Ans : (c) Alveoli of lungs 8 ...
P a g e | 1 ASSIGNMENT Class 10 Subject – BIOLOGY Teacher: Mrs. Sandhya Sood Chapter 15 (OUR ENVIRONMENT) 1) A food chain always starts with _ 2) Ozone layer is damaged by ___ 3) What limits the number of trophic levels in a good chain? 4) Name the main source of energy in self-sustaining ecosystem? 5) Write an aquatic food chain. 6) Which of the following is non - biodegradable:- (a) Paper (b) wood (c)cloth (d)plastic 7) Which of the following is not a terrestrial ecosystem:- (a) Forest (b) desert (c) Aquarium (d) grassland 8) What will happen ...
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