Download CBSE Class 10th Science Sample Paper 2020 PDF With Answers: Central Board Of Secondary Education has already released the CBSE Class 10th Official Question Bank 2020 PDF. CBSE Class 10th Science Sample Paper 2020 PDF With Answers is available here to download.

We have already shared CBSE Class 10th English Question Paper PDF with you. CBSE Class 10th Science Exam 2020 is going to be conducted on 04th March 2020. The question paper for same exam with answer key will be available on Examstocks right after the exam.

CBSE Class 10th Science Sample Paper 2020 PDF: Overview

Article Name	CBSE Class 10th Science Sample Paper 2020 PDF With Answers
Category	Study Materials
Name Of The Exam	CBSE Class 10th Science Exam 2020
Name Of The Organization	Central Board Of Secondary Education
CBSE Class 10th Science Exam Date 2020	04th March 2020
Exam Mode	Offline
Exam Level	National Level Exam
Official Website	http://www.cbse.nic.in/

CBSE Class 10 Science Exam Pattern 2020

Here we have shared the complete CBSE Class 10 Science Exam Pattern 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 all one mark questions which include MCQs, VSA type and assertion-reason type questions. These are to be answered in one word or in one sentence.
• Question numbers 15 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.
• The maximum number for the paper is 80 marks.

There is no overall choice in the paper. However, internal choices are provided in:

• 3 questions of Section-A
• 3 questions of Section-B
• 3 questions of Section-C

CBSE Class 10 Science Unit-wise Weightage for Board Exam 2020

Here we have mentioned the CBSE Class 10th Science Unit-Wise Weightage for Board Exam 2020. Check the Image given below:

Class 10 Science Sample Question Paper 2020 PDF

SECTION A

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?

4. Question numbers 4(a) – 4(d) are based on the two tables given below. Study these tables related to blood sugar levels and answer the questions that follow.

Table A (Blood glucose chart) Good

	Mean Blood Glucose Level (mg/dL)
Doctor’s advice needed	380
	350
	315
	280
	250
	215
Good	180
	150
Excellent	115
	80
	50

Table B (Blood Report of Patient X and Y)

Time of check	Blood Glucose ranges (mg/dL)
	Patient X	Patient Y
Before breakfast (Fasting)	< 100	70-130
Before lunch, supper and snack	< 110	70-130
Two hours after meals	< 140	< 180
Bedtime	< 120	90-15

4(a) Refer to Table B showing the blood report of the levels of glucose of patients X and Y. Infer the disease which can be diagnosed from the given data.

4(b) Identify the hormone whose level in the blood is responsible for the above disease.

4(c) Which one of the following diets would you recommended to the affected patient?

i) High sugar and low fat diet.

ii) Low sugar and high protein diet.

iii) High Fat and low fiber diet.

iv) Low sugar and high fiber diet.

4(d) Refer to the Table A and suggest the value of the mean blood glucose level beyond which doctor’s advice is necessary:

i) 180 mg/dL

ii) 115 mg/dL

iii) 50 mg/dL

iv) 80 mg/dL

5. When we enter a dark room coming from outside, immediately the things inside the room do not appear clear to our eyes. This is because

i) pupils do not open at all in the dark.

ii) pupils take time to adjust.

iii) light travels slower in a dark room.

iv) pupils open very quickly in the dark.

OR

The phenomena of light responsible for the working of the human eye is

i) reflection

ii) refraction

iii) power of accommodation

iv) persistence of vision

6. When a 4V battery is connected across an unknown resistor there is a current of 100 mA in the circuit. The value of the resistance of the resister is:

i) 4 Ω

ii) 40 Ω

iii) 400 Ω

iv) 0.4 Ω

7. Unit of electric power may also be expressed as:

i) volt-ampere

ii) kilowatt-hour

iii) watt-second

iv) joule-second

8. It was found that water from a river was contaminated with Coliform bacteria. Which one of the following pollutant might have got mixed with the water?

i) Fertilizer run off

ii) Industrial waste

iii) Pesticides

iv) Human faecal matter

OR

Which one of the following stakeholders of forests causes the maximum damage to forest?

i) People who live in or around the forest

ii) The forest department of the government

iii) The wildlife and native enthusiasts

iv) The industrialists

9. Which one of the following green house gases is a contributor due to incomplete combustion of coal and petroleum?

i) Oxides of nitrogen

ii) Methane

iii) Carbon monoxide

iv) Carbon dioxide

10. Which of the following reactions is an endothermic reaction?

i) Burning of coal.

ii) Decomposition of vegetable matter into compost.

iii) Process of respiration.

iv) Decomposition of calcium carbonate to form quick lime and carbon dioxide.

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1. Select the right time to start preparing for board exams.
2. Good timetable and startegy will make the preparations easy.
3. Sufficient time should be devoted to self study.
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5. Make a strategy to learn long answers for board exams.
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CBSE Class 10th Science Question Paper 2020 PDF With Solutions

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