CBSE ADDA

Class 10 our environment board solved Questions 2016 1. What is the function of ozone in upper atmosphere? Ans: It shields the surface of the earth from ultraviolet rays from the Sun. 2. Why should biodegradable and non biodegradable waste be discarded in two separate dustbins? Ans: So that the time and energy required in segregation may be saved and waste may be disposed off quickly 3. The following organisms form a food chain. Which of these will have the highest concentration of non-biodegradable chemicals ? Name the phenomenon associated with it. Insects, Hawk, Grass, Snake, Frog. Ans: Hawk ; Biomagnifications 4.. Write the full name of the group of compounds mainly responsible for the depletion of ozone layer. Ans: Chloroflurocarbons 5. List two examples of natural ecosystem. Ans: Forests ,Ponds,Lakes 6. Differentiate between biodegradable and non-biodegradable substances with the help of one example each. List two changes in habit that people must adopt to dispose non-biodegrad

Practice these questions to excell in exam 2016 Class 9 maths SA2 Question paper - 1 Download File Class 9 maths SA2 Question paper - 2 Download File Class 9 maths SA2 Question paper - 3 Download File Class 9 maths SA2 Question paper - 4 Download File Class 9 maths SA2 Question paper - 5 Download File Class 9 Science SA2 Question paper - 1 Download File Class 9 Science SA2 Question paper - 2 Download File Class 9 Science SA2 Question paper - 3 Download File Class 9 Science SA2 Question paper - 4 Download File Class 9 Science SA2 Question paper - 5 Download File Formore papers visit  class 9 Question paper for exam2015 SA2