CBSE Biology Value Based Questions (VBQs) for Class 9 and 10

Class 9 and Class 10 CBSE Biology VBQs 

CBSE Guess and Guide

CBSE (Central Board of Secondary Education) has introduced 'Value Based Questions' (VBQs) of 3 to 5 marks in 15 subjects including almost all the major subjects in Class X and Class XII CBSE Board Examinations from 2013. The following questions are an attempt to develop a CBSE Biology Value Based Questions Bank (VBQs) for Class 9 and Class 10 CBSE Board Examinations.

CBSE Biology - Value Based Questions Bank

Question 1: During her tour to a renowned forest, Sakshi found a highway being constructed which passes through the middle of the forest. This made her quite unhappy and on return she approached the concerned department of the local Ecological Society and asked them to stop this construction.
(a) What values did Sakshi reflect here?
(b)  In your opinion what would be the effect on biodiversity if the highway is constructed.
Answer: (a) Love for nature and environmental consciousness. She was brave and had a vision to see the disaster in the future.
(b) Existence of the forest habitat of that place would be disrupted since animals will be confined to a smaller area. Fragmentation characteristically reduces species richness and taxon diversity, and may reduce to efficacy of ecosystem functioning. This not only reduces the amount of functional habitat, but it may also isolate a species population into subpopulations, that may be adequately near the minimum viable population size, to risk local extinction from successive demographic processes or catastrophic events.     
Question 2: Arman, while passing by a street stopped to see some children gathering in front of a road-side tree. He got annoyed as he saw those children were throwing stones at a snake on the tree which was trying to protect itself by moving up & down.  Immediately Arman stopped the children from throwing stones and called the snake help line number.
(a) Do you think Arman did the right thing & why ?
(b) What values did he show ?
(c) What do the persons working with snake helpline do?
(d) Can you name an Organization working for animals?
Answer: (a) I think Arman did the right thing by showing his concern for an animal which was in trouble.
(b) Love and concern about nature and biodiversity.
(c) The persons working in the snake-helpline visit the spot, catch the snake live nad then leave them in their natural habitat.
(d) People for Animals. 
Question 3: Ravi was rushed to a nearby hospital after an accident which caused heavy bleeding. He needed blood immediately. But the hospital failed to provide 'O' negative blood for transfusion. Rehman who was attending a patient learned about the situation and being of the same blood group agreed to donate blood. Ravi's mother initially refused but agreed later after being convinced by her daughter.
(a) What values and similarities do you find in the thinking of Ravi's sister and Rehman ?
(b) Why can't 'O' positive blood be transfused into Ravi's body ?
(c) What is the genetic basis of blood group inheritance ?
Answer: (a) humanity is above all religion. ravi’s sister shows understanding of science. Rehman believes in helping a person in need without thinking about which religion or caste he belongs to.
(b) ‘O positive’ blood group contains antigen for ‘Rh factor’ while ‘O negative’ blood lacks antigen. So if the two bloods mix it will cause blood clotting resulting in death of the patient.
(c) Human blood groups are ‘A’, ‘B’, ‘AB’ and ‘O’. These four phenotypes are expressed by paired combination of three alleles (lA, lB and I). IA and IB are dominant alleles for blood groups ‘A’ and ‘B’ respectively. Blood group ‘O’ is due to lack of any dominant gene. Its genotype is II. Allele IAIB expresses both dominant traits and the blood group is ‘AB’.     
Question 4: Aditya participated in a group discussion in his school on "The ill effects of the tobacco on human health". In the evening he goes with his family for dinner and insists on sitting in the "Non-smoking Zone" to which his father (who is a chain-smoker) objects.
(a) In this situation who wind your support - Aditya's concern for health and environment or his father's objection ? Justify giving two reasons.
(b) Suggest any three effective propaganda campaigns for Anti-Tobacco awareness.
(Courtesy: CBSE website for question 4)
Answer: (a) I will support Aditya’s concern for the health of his family. Both Active as well as Passive smoking is injurious to health as smoking is associated with increased incidence of concerns of lungs, urinary bladder, throat and oral cavity, bronchitis, emphysema / coronary heart disease, gastric ulcer etc.
(b) Propaganda Campaigns for Anti-tobacco Awareness:
1. By printing statutory warning on cigarette packets.
2. Through advertisement in mass media such as TV, Newspaper etc.

3. Discourage smoking by designating public places as Non-smoking Zones.      

CBSE Class 12 Physics Sample Practice Paper for SA1

CBSE Class 12 PHYSICS QUESTION PAPER (Practice Paper) for SA1

SUMMATIVE ASSESSMENT 1 (Physics Mock Test)
Time: 3 hrs                                                                 
Max Marks: 70
GENERAL INSTRUCTIONS:
a)     All questions are compulsory.
b)     There are 30 questions in total. Questions 1 to 8 carry one mark each, questions 9 to 18 carry two marks each, questions 19 to 27 carry three marks each and questions 28 to 30 carry five marks each.
c)     There is no overall choice. However, an internal choice has been provided in one question of two marks, one question of three marks and all three questions of five marks each. You have to attempt only one of the given choices in such questions.
d)     Use of calculators is not permitted.
e)     You may use the following physical constants wherever necessary:
Question 1. Why should the material used for making permanent magnets have high coercivity?
Question 2. What are the values of (a) the horizontal component of earth's magnetic field (b) the angle of dip. at the magnetic north pole of the earth?
Question 3. The power factor of an ac circuit is 0.5. What will be the phase difference between voltage and current in this circuit ?
Question 5. A wire of irregular shape in magnetic field as shown in the diagram turns into a circular shape. Determine the direction of induced current.
12th Physics Practice Paper (Mock Test) image

Question 8. Draw the graph showing the variation of intensity of magnetization of a paramagnetic sample with temperature.
Question 10. "Lenz's Law is a consequence of the principle of conservation of energy". Justify this statement.
Question 13. What are eddy currents ? How can they be minimized ?
Question 14. A ray of light incident on an equilateral glass prism shows minimum deviation of 300. Calculate the speed of light through glass prism. 
Question 16. Define current sensitivity and voltage sensitivity of a galvanometer. Increasing the current sensitivity may not necessarily increase the voltage sensitivity. Justify.
Question 19. The following figures represent three AC circuits with equal currents. If the frequency of emf be increased (without change in emf), then what will be the effect on the current through the circuits ? Explain with reason.
Question 20. Draw a labelled diagram of an AC generator.  Explain briefly its principles working with analytical treatment.
Question 22. Derive an expression for impedance in an AC circuit containing L, C and R in series. Also find an expression for resonant frequency of such a circuit. 
Question 26. Draw a ray diagram showing the passage of light through a glass prism.  Hence obtain a relation between the angles of deviation, incidence and emergence and the angle of prism. 
Question 28.
(i) Using Biot-Savart's law, deduce an expression for the magnetic field on the axis of a circular current carrying loop.
(ii) Draw the magnetic field lines due to a circular current carrying loop. 
Question 30.
(a) What is Capacitive Reactance?
(b) Show graphically the variation of Capacitive Reactance with frequency of the applied alternating voltage.
(c) An alternating voltage E = Eo Sin ωt is applied across a pure capacitor of capacitance C.

CBSE Guess, NCERT Questions Bank for 7th Science - Chapter 4, Heat


CBSE Class 7 NCERT Science - Chapter 4, heat

Solutions of CBSE Hots and additional NCERT Questions

Question.1: Give the names of any three kinds of thermometers.
Answer: Clinical thermometer, Laboratory thermometer, and Maximum-minimum thermometer.
Question.2: Which metal is used in the bulb of thermometer?
Answer: Mercury.
Question.3: What is the unit of temperature?
Answer: SI unit of temperature is Kelvin (K). Other units are Celsius and Fahrenheit.
Question.4: What is the range of clinical thermometer?
Answer: 35OC to 42OC.
Question.5: By which method we get heat from the sun?
Answer: Radiation.
Question.6: What kind of cloth we prefer in summer?
Answer: Light coloured clothes.
Question.7: What are conductors?
Answer: The materials which allow heat to pass through them.
Question.8: State whether following statements are true or false:
a. Our sense of touch about hotness or coldness is not always reliable.
b. Normal temperature of human body is 98.6OC.
c. In all cases heat flows from a hotter object to a colder object.
d. Water at higher temperature feels hotter.
e. Marking on clinical thermometer is from 0OC to 100OC.
f. Shinning thread in thermometer is the column of mercury.
g. The materials which allow heat to pass through them easily are called conductors.
h. Water and air are good conductors of heat.
i. Woolen clothes keep us warm during winter.
j. The maximum and minimum temperature of the day is measured by a laboratory thermometer.
k. Celsius is the SI unit of temperature.
l. Conduction is the method of transfer of heat in gases.
Answer: (a) T  (b) F  (c) T  (d) T  (e) F  (f) T  (g) T  (h) F  (i) T  (j) F  (k) F  (l) F 
Question.9: Fill in the blanks:
(i) Temperature is the measure of _________ of an object.
(ii) The thermometer used to measure human body temperature is called __________ thermometer.
(iii) The normal temperature of human body is ___________OC.
(iv) A ___________ near the bulb of a clinical thermometer prevents mercury level from falling of its own.
(v) The water and air are ___________ conductors of heat.
(vi) All hot bodies radiate ______________.
(vii) Wool is a ____________ conductor of heat.      
Answer: (i) hotness.  (ii) clinical.  (iii) 37.  (iv) kink.  (v) poor.  (vi) heat.  (vii) poor.   

 HEAT - NCERT Solutions (click below to study)


CBSE Guess Questions for Chapter 10 Law and Social Justice - Class 8 Civics Social and Political Life III


Class VIII Civics - NCERT Social and Political Life III

Chapter 10, Law and Social Justice

CBSE Guide: Solutions of CBSE Guess additional important questions

http://www.cbsencertsolution.com/2017/06/cbse-guess-questions-for-chapter-10-law-and-social-justice-class-8-civics.html
Question 1: Why do we need a law on minimum wages?
Solution: A law on minimum wages is necessary in order to ensure that workers are not under paid or are paid fairly.

Question 2: Find out:
a)  What is the minimum wage for a construction worker in your state?
b)  Do you think the minimum wage for a construction worker is adequate, low or high?
c)  Who sets the minimum wages?
Solution:
·      Above 150 daily.
·      Adequate.
·      Labour ministry of the state.

Question 3: Why do you think enforcement of safety laws is important in any factory?
Solution: The enforcement of safety laws in a factory is important for the safety of the workers and the general public.

Question 4: Can you point to a few other situations where laws (or rules) exist but people do not follow them because of poor enforcement? (For example, over speeding by motorists).
Solution: Yes, they are:
a)  Zebra Crossing only for road crossing.
b)  Not to urinate at public places.
c)  Not to board a running bus.

Question 5: What are the problems in enforcement?
Solution: The problems in enforcement are:
1)       Lack of adequate staff.
2)       Untrained people.
3)       Over crowdedness.

Question 6: Can you suggest some ways in which enforcement can be improved?
Solution: Yes,
·  Deployment of adequate number of enforcement staff.
·  Stringent punishment for the violators.
·  Summary trials.
·  Offence to be made unbailable.

Question 7: A 'clean environment' is a public facility. Can you explain this statement?
Answer: The environment is something which the people over generations will share. The courts also gave a number of judgements upholding the right to a healthy environment as intrinsic to the Fundamental Right to life. It includes the Right to the Enjoyment of pollution-free water and air for full enjoyment of life.

Question 8: Why do we need laws?
Answer: Laws are necessary to protect people from unfair practices. The laws also ensure the safety of the people.

Question 9: Can you think of some other ways in which the environment can be protected?
Answer: In the recent years there has been a consistent increase in awareness of the need for a clean environment. The courts in our country have come out with a number of strong orders on the environmental issues and accordingly steps are also being taken to reduce pollutions. But still many more things have to be done in this direction:
a)   Appropriate measures need to be taken by countries and local authorities of the world to stop the misuse or overuse of resources.
b)   Environmental degradation can be checked by conserving land, air and water resources. For this we have to control the pollutants at the source.
c)   By proper enforcement of laws and norms related to environmental issues such as - use of plastic bags, disposal of all type of wastes, harmful emissions from different industries, etc. People can also help and pressurize Government authorities to create a cleaner environment.


  Class VIII Social and Political Life III (Civics) - Further Study
[other chapters]      
  CBSE Class VIII - Related Posts

Tribals, Dikus and The Vision of a Golden Age - CBSE Guess for 8th NCERT History - Chapter 4, Our Pasts III

CBSE Guess and Guide for Class 8 NCERT History, OUR PASTS III (Part-I)

Tribals, Dikus and The Vision of a Golden Age

Solutions of CBSE Guess Questions

Tribals, Dikus and The Vision of a Golden Age - CBSE Guess for 8th NCERT History - Chapter 4, Our Pasts III - image
QUESTION.1: When the British noticed the spread of Munda’s movement, what did they do?
Solution: With the spread of Munda’s movement and its acceptance by the people of the region, the British got worried and decided to stop it. They arrested Birsa Munda in 1895, convicted him on charges of rioting and violating law and also sent him to jail.  
QUESTION.2: What are the major features of tribal societies?
Solution: Major features tribal societies are -
·     Most of the tribes had customs and rituals quite different from those laid down by Brahmins.
·     These societies did not have sharp social divisions that were characteristic of caste societies.
·     All of them belonged to the same tribe.
·     They thought of themselves as sharing common ties of keen ship.
·     There were however, social and economic differences within tribes.   

 Tribals, Dikus and The Vision of a Golden Age - also study NCERT solutions

Tribals, Dikus and The Vision of a Golden Age - NCERT answers of CBSE Class 8 history Chapter 4 Our Pasts III (Part I) chapter exercise

Human Resources - CBSE Notes and Guess for 8th NCERT Geography - Resources and Development

Class 8 NCERT Geography - Resources and Development

HUMAN RESOURCES

 CBSE Notes 

Density of Population: The number of persons living per unit area, say per square kilometer on the average is called Density of Population. Example - 324 persons per square kilometer in India (2001 census)

Sex Ratio: The number of females per thousand of males is termed as sex ratio.

Birth Rate: Birth Rate refers to live births per thousand of persons every year.

Natural Growth Rate: The difference between birth rate and death rate of a country is known as Natural Growth Rate.

Life Expectancy: Life expectancy is the number of years for which an average man expects to live. 

Solutions of CBSE Guess Questions (1 Mark)

QUESTION.1: Which hemisphere has more population?
Answer: Northern hemisphere.

QUESTION.2: What is the average density of world population?
Answer: 45 persons per square km.

QUESTION.3: Name the country with slowing growth rate of population.
Answer: United Kingdom.

QUESTION.4: What are the people called who have come from other countries?
Answer: Immigrants.

QUESTION.5: What is Emigration?
Answer: Movement of people to other countries is called Emigration. 

Solutions of CBSE Guess Questions (5 Mark)

QUESTION.6: Which are the geographical factors affecting the distribution of population?
Answer: The geographical factors affecting the distribution of population are:
a.       Topography - People generally prefer living on plains rather than on mountains or plateaus as these areas are suitable for farming and other similar activities.
b.       Soil - People prefer to live in areas with fertile soil as it supports agriculture.
c.       Climate - People avoid extreme climates.
d.       Water - People prefer living in the areas where fresh water is easily available.
e.       Minerals - People are attracted towards the areas rich in mineral deposits.

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