Question 12 Marks
Modify the diagram below by changing the wrong words.
Answer
View full question & answer→The correct diagram is shown below:
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Question 22 Marks
Complete the following flow chart based on ecosystem and its components.
Answer
View full question & answer→i. aquatic
ii. abiotic
iii. non living organisms
iv. living organisms
v. Ecosystem is a system, or a group of interconnected elements, formed by the interaction of a community of organisms with their environment.
ii. abiotic
iii. non living organisms
iv. living organisms
v. Ecosystem is a system, or a group of interconnected elements, formed by the interaction of a community of organisms with their environment.
Question 32 Marks
Why is damage to the ozone layer a cause for concern? What steps are being taken to limit this damage?
Answer
View full question & answer→Ozone layer acts as a protective shield against the harmful Ultraviolet rays of the sun. Depletion of ozone layer leads to exposure to Ultraviolet rays \& due to this the incidences of cancer, cataract are on rise. Also the uv rays damage the immune system of human beings.
In 1987, United Nations Environment Programme (UNEP) succeeded in forging an agreement between nations to freeze chlorofluorocarbons (CFCs) production to 1986 levels. CFCs are the main cause of ozone layer depletion.
In 1987, United Nations Environment Programme (UNEP) succeeded in forging an agreement between nations to freeze chlorofluorocarbons (CFCs) production to 1986 levels. CFCs are the main cause of ozone layer depletion.
Question 42 Marks
i. Why does a kitchen garden called an artificial ecosystem while a forest is considered to be a natural ecosystem?
ii. While designing an artificial ecosystem at home, write any two things to be kept in mind to convert it into a self-sustaining system. Give reason to justify your answer.
ii. While designing an artificial ecosystem at home, write any two things to be kept in mind to convert it into a self-sustaining system. Give reason to justify your answer.
Answer
View full question & answer→i. The kitchen garden is known as an artificial ecosystem because they are manmade where specific biotic and abiotic elements are utilized. A kitchen garden is an ecosystem where the plants such as rice, wheat, vegetables, etc. are cultivated. Farmers operate the relationship between the abiotic factors and producers
ii. When designing an artificial ecosystem at home, there are two important things that need to be kept in mind to convert it into a self-sustaining system: Balance between biotic and abiotic factors and Recycling of nutrients and waste.
ii. When designing an artificial ecosystem at home, there are two important things that need to be kept in mind to convert it into a self-sustaining system: Balance between biotic and abiotic factors and Recycling of nutrients and waste.