Description

Environmental Science (333)
Tutor Marked Assignment
Maximum Marks: 20

Note: (i) All questions are compulsory. The marks allotted for each question are besides the questions.
(ii) Write your name, enrollment number, AI name and subject on the top of the first page of the answer sheets.

1. Answer any one of the following questions in about 40-60 words
a) Why do ‘stars’ appear as shiny points of light in the sky on a clear night? Name the planet that is nearest to the earth. (See Lesson-1)
b) Given below are names of some minerals. Classify them into metallic and non-metallic.
Limonite, Kyonite, Copper, Gypsum. (See Lesson-16)

2. Answer any one of the following questions in about 40-60 words.
a) “Although Rain water is supposed to be beneficial for our crops but continued rainfall does more harm than good to our crops.” Explain this statement in your words. (See Lesson-17)
b) A farmer finds the following symptoms in his buffalo.
 Appearance of small nodules
 Fever too
Name the disease and its causal organism. Mention two other animals that may get affected by this disease. (See Lesson-20)

3. Answer any one of the following questions in about 40-60 words
a) How is the festival of Vishu Kini celebrated in Kerala? What does it show? (See Lesson-26)
b) Mention four important objectives of The Air (Prevention and Control of Pollution) Act 1981 and Amendments 1987. (See Lesson-25)

4. Answer any one of the following questions in about 100-150 words
a) Human settlements in cities are fast increasing. Do you consider them to form an ecosystem and ecosystem of what kind – natural or manmade? Discuss three positive aspects of urban ecosystem. (See Lesson-7)
b) Floods cause lot damage e to our property, lives, agricultural crops etc. Suggest any four preventive methods to manage/control floods. (See Lesson-12)

5. Answer any one of the following questions in about 100-150 words
a) (i) “To increase precipitation, it is essential to control air pollution.” Explain in your own words. (See Lesson-27A)
(ii) During which part of the year can we replenish ground water? (See Lesson-28A)
b) (i) It is said that if there is a nuclear war, there would be only dark winter because the sun would be cut off. Explain the reason in two sentences. (See Lesson-27B)
(ii) Nuclear energy is available from both nuclear fusion and fission. How is that possible? (See Lesson-28B)

6. Prepare any one project work from the two projects given below.
Fire incidents are increasing day by day in the world. As we know fire is the rapid oxidation of a combustible material in the exothermic process of combustion, releasing heat, light and various reactive products and it also has potential to result in conflagration (large fire which can damage human and animal life and any property) which can lead to permanent physical damage. Forest fire is one of the types of fire which also divested vegetation as well as the wildlife. Recently there is a fire in the forest of California in the year end of 2024. California has dry, windy and often hot weather conditions from `spring through autumn that can produce moderate to severe wildlife.
Prepare a project report to give answer the following question.
1. How would you define forest fire?
2. What are the main causes of forest fires in California?
3. How does forest fire impact forest environment?
4. What mitigation solutions would you like to suggest for avoiding such forest fire in near future?
For this project, you can take help of your family members, teacher from your study centre, newspaper and internet.

b) Go out to a nearby field and collect some leguminous plants. Observe their roots carefully. Write your observation and draw the diagram of these roots. Prepare a report regarding the cause of the development of nodules as well as its significance. Draw a simplified flow chart of biochemical steps involved in this process.