Environment Activity PDF

Activity 13.9 n Search the internet or library to find out what hazardous materials have to be dealt with while disposing of electronic items. How would these materials affect the environment?...

Activity 13.9 n Search the internet or library to find out what hazardous materials have to be dealt with while disposing of electronic items. How would these materials affect the environment? n Find out how plastics are recycled. Does the recycling process have any impact on the environment? Q U E S T I O N S ? 1. What is ozone and how does it affect any ecosystem? 2. How can you help in reducing the problem of waste disposal? Give any two methods. What you have learnt n The various components of an ecosystem are interdependent. n The producers make the energy from sunlight available to the rest of the ecosystem. n There is a loss of energy as we go from one trophic level to the next, this limits the number of trophic levels in a food-chain. n Human activities have an impact on the environment. n The use of chemicals like CFCs has endangered the ozone layer. Since the ozone layer protects against the ultraviolet radiation from the Sun, this could damage the environment. n The waste we generate may be biodegradable or non-biodegradable. n The disposal of the waste we generate is causing serious environmental problems. E X E R C I S E S 1. Which of the following groups contain only biodegradable items? (a) Grass, flowers and leather (b) Grass, wood and plastic (c) Fruit-peels, cake and lime-juice (d) Cake, wood and grass 2. Which of the following constitute a food-chain? (a) Grass, wheat and mango (b) Grass, goat and human 216 Science 2024-25