CBSE Class 10 Sample Papers of all subjects are released for board exam 2020. Sample papers along with marking schemes have been published as per the changed pattern which will be followed while preparing the questions papers in board exam 2020. Here, we present the CBSE sample paper and marking scheme for class 10 Science subject. Students must thoroughly analyse the pattern of question paper and marking trends to make an effective plan for board exam preparations.
Structure of CBSE Class 10 Science Sample Paper 2020
- The question paper consists of 30 questions divided into three sections – A, B and C.
- Question numbers 1 to 14 in Section-A are one mark questions which include MCQ, VSA type and assertion-reason type questions. These are to be answered in one word or in one sentence.
- Question numbers 14 to 24 in Section-B are three-mark questions which include short answer type questions. These are to be answered in about 50-60 words each.
- Question numbers 25 to 30 in Section-C are five-mark questions which include long answer type questions. These are to be answered in about 80-90 words each.
- Paper carried a total of 80 marks.
There is no overall choice. However, internal choices are provided in some questions as mentioned below:
- 3 questions in Section-A
- 3 questions in Section-B
- 3 questions in Section-C
Recommended Books for Class 10 Science Board Exam 2020 Preparation & Revision:
Class 10 Science Sample Question Paper 2020 is provided below:
1. Define catenation.
2. How does valency of an element vary across a period?
3. Answer question numbers 3(a) - 3(d) on the basis of your understanding of the following paragraph and the related studied concepts.
Renewable energy sources such as wind energy are vital for the Indian economy, not only from the point of view of supply, but also from the perspective of environmental and social benefits. India is the world’s fifth largest wind-power producer and the largest windmill facilities in India are installed in Tamil Nadu. Muppandal is a small village of Tamil Nadu and one of the most important sites of wind-farm in the state. It uses wind from the Arabian Sea to produce renewable energy. The suitability of Muppandal as a site for wind farms stems from its geographical location as it has access to the seasonal monsoon winds.
The electrical generators used on wind turbines in sites like Muppandal, produce an output AC of 240 V and a frequency of 50 Hz even when the wind speed is fluctuating. A transformer may be required to increase or decrease the voltage so it is compatible with the end usage, distribution or transmission voltage, depending on the type of interconnection.
3 (a) State the principle behind electric generator.
3 (b) The output frequency of wind turbine is 50 Hz. What is meant by this statement?
3 (c) Why do you think Muppandal is at an advantageous position for this project?
3 (d) Based on the data represented in the graph below, which of the two cities A or B would bean ideal location for establishing a wind-farm and why?
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