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 ...
World Environment Day- 2021 Online Quiz organized by ECPO, Bhopal 5 June, 2021 (03.00 PM to 03.30 PM) No. of Questions - 25 (Each question carries 4 marks) Total Marks: 100 ------****----- Answer key of Online WED Quiz. 1. Which of the following country will host the World Environment Day 2021 event? A. Germany B. Pakistan C. India D. Canada 2. What is the theme of World Environment Day 2021? A. Ecosystem Restoration B. Restore Our Earth C. Connecting People with Nature D. Seven Billion Dreams 3. The first World Environment Day was held in which year? A ...
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 ...
OUR ENVIRONMENT VERY SHORT ANSWER TYPE QUESTIONS [1 Mark] 1. What will happen if we kill all the organisms in one trophic level? Answer. If we kill all the organisms in one trophic level, the following effects will take place: The population of organisms in previous trophi’c level will increase. The organisms in next trophic level will not be able to get the food, so they will migrate to some other ecosystem or die. It will cause an ecological imbalance in the food chain. 2. Why did United Nations act to control the production of chlorofluorocarbons (CFC ) used ...
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