Mathematics Science and Pedagogy mcq

Quiz-4: Mathematics, Science and Pedagogy MCQ Questions with Answer

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Mathematics, Science and Pedagogy MCQ Question with Answer

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Q31. The process of heating milk to 70 °C for about 15–30 seconds, then suddenly cooling it is called

(a) Preservation

(b) Sterilization

(c) Pasteurization

(d) Fortification

Answer: (c)

Explanation: Pasteurization is a process in which bacteria present in milk are killed by heating it to around 70°C for about 15-30 seconds then suddenly cooling it. Preservation is protecting food from decaying by drying, pickling or making jams. Sterilization is heating things in an autoclave especially surgical instruments, bandages, etc. to make them bacteria Fortification is enhancing the nutritional value of a food product by adding nutrients (minerals and vitamins) to it.

Q32. Estrogens the female sex hormones are produced in the

(a) Uterus

(b) Ovaries

(c) Pituitary Gland

(d) Liver

Answer: (b)

Explanation: Ovaries produce estrogens. These hormones control the secondary sexual characters in females and regulate the menstrual cycle and development of the endometrium (uterine lining). The uterus does not produce estrogens. The pituitary gland controls the production of estrogens by the ovaries through FSH and LH but does not produce estrogens. The liver has no role in the production of hormones.

Q33. In comparison to the inhaled air, the composition of exhaled air is

(a) 78% nitrogen, 4% carbon dioxide, and 17% oxygen

(b) 78% nitrogen, 17% oxygen, 4% carbon dioxide and a large amount of water vapour

(c) 0.04% carbon dioxide, 21% oxygen, 78% nitrogen and a large amount of water vapour

(d) 10% oxygen, 8% carbon dioxide, 81% nitrogen and a small amount of water

Answer: (b)

Explanation: Inhaled air has 21% oxygen. After absorption of oxygen in the alveoli, it comes down to 17%. Carbon dioxide in the inhaled air is very little (0.04%). Blood releases carbon dioxide into the alveoli and the amount of carbon dioxide coming out increases to 4%. Nitrogen in the inhaled air is about 79% and it comes out unused. Inhaled air has very little amount of water vapour but the air coming out gets a lot of water from the moist surface of alveoli, bronchioles, bronchi, trachea and the nasal passage. Its temperature also equals to that of the body temperature.

Q34. The wavelength of a sound wave whose frequency is 220 Hz and speed is 440 m/s in a given medium is

(a) 3 m

(b) 2 m

(c) 4 m

(d) 5 m

Answer: (b)

Explanation: Speed of the sound wave = Wavelength x Frequency

∴ Wavelength= Speed/Frequency = 440/220 = 2 m

Q35. A person of 800 N weight is going up in an accelerator. The accelerator is moving with a uniform velocity. What is the force exerted by the person on the floor of the escalator?

(a) 600 N

(b) 800 N

(c) 1000 N

(d) 1200 N

Answer: (b)

Explanation: When there is no acceleration, the force remains equal to mass.

Q36. An athlete is running along the boundary of a square playground of perimeter 2000 m at a speed of 200 m/min. He ran for 30 min. How much distance did he cover and what is the magnitude of his displacement?

(a) Distance =6 km, Displacement = 0 km

(b) Distance =6000 m, Displacement = 1000 m

(c) Distance = 5 km, Displacement = 0 km

(d) Distance = 5000 m, Displacement = 5000 m

Answer: (a)

Explanation: Time is taken by the athlete to take one full round of the ground = Distance/Speed 2000 m

(Perimeter of the ground)/200 m/min (speed) = 10 minutes

In 10 minutes he completes 1 round. In 30 minutes he will complete 3 rounds.

∴ Distance covered = 2000 x 3 = 6000 m

After 3 full rounds, he is back at the place from where he started.

Displacement = 0 m.

Q37. Which of the following are true for displacement?

I. It cannot be zero.
II. Its magnitude is greater than the distance travelled by the object.
III. Its magnitude is less than the distance travelled by the object.
IV. Its magnitude is equal to the distance travelled by the object.

(a) III and IV

(b) I and III

(c) II and IV

(d) I and IV

Answer: (a)

Explanation: The magnitude of displacement is always less than or equal to the distance covered.

Q38. Water is one of the important components of food because

(a) It helps in the digestion by dissolving the food and facilitating its forward movement

(b) It helps to absorb the nutrients from the digested food in soluble form

(c) It helps in the excretion of waste

(d) All of the above

Answer: (d)

Explanation: Water is an important component of food because it is the main solvent in our body and all metabolic activities take place in solution form, i.e. digestion, circulation, excretion, all need water.

Q39. Which of the following statements about the roots are false?

I. Roots help plants anchor to the soil and prevent soil erosion.
II. Roots help in the absorption of water and minerals from the soil.
III. Plants that have root hairs generally grow in terrain that has scarce water.
IV. Roots cannot store food because photosynthesis is not possible without sunlight.

(a) II and IV

(b) II and III

(c) III and IV

(d) I, II and IV

Answer: (c)

Explanation: Roots contain tiny hair that sticks out of the roots and helps in the absorption of water and minerals. Plants like radish and carrots store food in their roots.

Q40. Which of the following statements are not true?

I. In asexual reproduction, plants produce new plants with seeds.
II. In sexual reproduction, new plants are obtained from seeds.
III. In vegetative propagation, new plants are produced from flowers.
IV. Vegetative reproduction is an asexual mode of reproduction in plants.

(a) I and II

(b) I and III

(c) II and IV

(d) III and IV

Answer: (b)

Explanation: In vegetative propagation or asexual reproduction in plants, new plants are produced from roots, stems and leaves. Such a mode of reproduction happens without seeds.

Q41. Plants depend on various types of seed dispersal to scatter their seeds. Which of the following sentences is false regarding Dandelion?

(a) Their seeds are dispersed by wind.

(b) They produce seeds in very little quantity.

(c) Their flowers are hairy, feather-like structures.

(d) Their seeds can germinate far away from their parent plant.

Answer: (b)

Explanation: Dandelion seeds are small and hairy or feather-like structures. They produce seeds in large quantities so that most of the seeds get blown to the locations where effective germination can take place.

Q42. Which of the following is incorrect?

I. Plant seeds develop in the ovary which itself usually becomes the fruit.
II. Plants produce flowers in order to make seeds so that their species can propagate.
III. Just as roots of some plants store food, they may also have nodes, internodes and buds.
IV. For photosynthesis, leaves take in carbon dioxide and water from the soil to release oxygen in the air.

(a) I and III

(b) II and IV

(c) III and IV

(d) I, III and IV

Answer: (c)

Explanation: Roots lack leaves, nodes, internodes and buds. Plants receive carbon dioxide for photosynthesis from the air.

Q43. Find out the odd pair.

(a) Leaves : Food

(b) Stomata : Protection

(c) Pollens : Bees

(d) Flowers : Reproduction

Answer: (c)

Explanation: Plants prepare food in leaves through photosynthesis. Stomata are surrounded by guard cells to protect plants from loss of water. Flowers help plants in reproduction.

Q44. In which of the following cases will the given metal not be able to displace copper from copper sulphate?

I. Zn + CuSO4 →?
II. Hg + CuSO4 →?
III. Pb + CuS04 →?
IV. Ag + CuS04 →?

(a) I and II

(b) II and III

(c) II and IV

(d) I, III and IV

Answer: (c)

Explanation: Mercury (Hg) and silver (Ag) will not be displacing copper from copper sulphate as both of them are less reactive than copper. Zinc (Zn) and lead (Pb) being more reactive than copper will replace it from its salt.

Q45. What is the right sequence of various steps during the process of photosynthesis?

I. Oxygen is released into the air through stomata.
II. Chlorophyll converts solar energy to chemical energy.
III. Hydrogen reduces carbon dioxide to produce carbohydrates.
IV. Chemical energy is used to split water molecules into hydrogen and oxygen molecules.

(a) I, I, II, III

(b) II, IV, I, III

(c) IV, I, III, II

(d) II, IV, III, I

Answer: (b)

Explanation: Option (b) is the right sequence of processes taking place in photosynthesis. Chlorophyll converts solar energy to chemical energy; chemical energy is used to split water molecules into hydrogen and oxygen molecules; oxygen is released into the air through stomata and hydrogen reduces carbon dioxide to produce carbohydrates.

Q46. In a balanced diet, the largest part of our food is contributed by

(a) Vitamins and minerals

(b) Carbohydrates and fats

(c) Proteins and minerals

(d) Fats and proteins

Answer: (b)

Explanation: The largest part of a balanced diet is represented by carbohydrates and fats. These are energy giving foods. A normal person requires about 400-500 g of carbohydrates per day.

Q47. Which of the following functions is not performed by fats?

(a) Insulation

(b) Storage of energy

(c) Hormone synthesis

(d) Absorption of vitamins B complex and C

Answer: (d)

Explanation: Fats are lipid molecules consisting of carbon, hydrogen and oxygen. They are the richest source of energy and can be stored in the body for future use. The subcutaneous fats act as an insulator of heat. Fats help in the absorption of fat-soluble vitamins such as A, D, E and K, but not of water-soluble vitamins such as B complex and C. They act as a precursor of various hormones and help in the synthesis of vitamin D.

Q48. Which of the following is not an appropriate way for the conservation of trees?

(a) Every deforestation immediately followed by afforestation

(b) Slogan writing and poster making to be used in localities

(c) Holding discussion at the local community level

(d) Making a law against cutting of trees

Answer: (a)

Explanation: Deforestation means cutting trees on a large scale. ‘Every deforestation immediately followed by afforestation’ is not a solution to the problems created by deforestation. It takes a few hours to cut the trees but takes many years for their growth.

Q49. One of the most basic ways for developing an understanding of the concepts of science is

(a) Keenly observing and experiencing

(b) Understanding abstracted information

(c) Memorising the facts and rules

(d) Repeated practice

Answer: (a)

Explanation: Concepts of science are deeply understood through observation and hands-on experience, instead of directly learning abstracted information, memorising the facts and rules or practising. Observing and experiencing help in obtaining the cognitive, affective and psychomotor objectives of teaching science.

50. Which of the following conditions is not a component of a good teaching-learning environment?

(a) Children learning by doing the things themselves with the assistance of a teacher

(b) Children helping each other in completing the task

(c) Children making fewer mistakes

(d) Children asking a lot of questions

Answer: (c)

Explanation: Children are expected to make mistakes in the process of learning and implementing the knowledge. However, they should be encouraged not to repeat the same mistakes.

Q51. Which of the following is a limitation of the discussion method?

(a) Developing habit of teamwork

(b) Providing safe space to less active students

(c) Enhancing problem-solving skills in students

(d) Providing scope of criticism for incorrect approaches, ideas and concepts

Answer: (b)

Explanation: In the discussion method, all the students sometimes do not participate. Therefore, it provides a safe space for less active students.

Q52. Which of the following techniques is the best to make students aware of different kinds of fuel?

(a) Showing pictures of fuels

(b) Discussing with them the uses of fuels

(c) Reading about types of fuels from the book

(d) Asking children to name and observe different types of fuels used at home or for travelling, etc.

Answer: (d)

Explanation: Learning is Learning is enhanced by observing and doing. Students should observe fuels used by the people so that they would be able to learn about them more effectively.

Q53. If a teacher finds that many students are not taking interest in the lesson in the class and feeling sleepy, then what should be her response towards those students?

(a) Warn them to be attentive and sit straight lest they should face punishment

(b) Ask them to wash their face so that they feel more attentive in class

(c) Start talking with them on another topic not associated with the subject being taught

(d) Pick some thought-provoking question types and interesting facts related to the running concept for discussion

Answer: (d)

Explanation: If a class starts feeling disinterested and sleepy while being taught a particular topic, a teacher should try to bring back the interest of the students by changing the teaching strategy. The sudden boredom of students could be easily dealt with by stimulating their thought processes. Having some interesting and thought-provoking discussions related to current concepts can easily stimulate them and bring back their interest.

Q54. Which of the following is not a component of active learning?

(a) Remembering

(b) Experimenting

(c) Questioning

(d) Exploring

Answer: (a)

Explanation: Remembering the concepts is not a component of active learning. The teacher should let the students discover by themselves through the essential components of active learning of science such as observing, exploring, experimenting, questioning, etc.

Q55. Which of the following activities is not good for the learning of science?

(a) Involving students in activities such as group discussions and group projects

(b) Giving home assignments that focus on revision and reinforcement

(c) Usually beginning a class by posting a few key questions

(d) Experimenting and brainstorming in the class

Answer: (b)

Explanation: A good home assignment in science should primarily focus on giving challenges and bringing excitement for extended learning, instead of focussing on revision and reinforcement.

Q56. How will you help your friend who suffers from loose motion and vomiting?

(a) By telling him to rest and not go out

(b) Telling him to take pain-relieving medicines

(c) Taking him to go to a hospital for vaccination

(d) Giving him fluids at frequent intervals

Answer: (d)

Explanation: Due to vomiting and diarrhoea (loose motion), the body dehydrates or loses a lot of water. So, people should increase the intake of liquids or fluids such as ORS and juices.

Q57. Higher achievement and self-esteem could be obtained in students by

(a) Engaging them in memorising the concepts

(b) Taking more periodic evaluation

(c) Following cooperative learning

(d) Giving more home assignments

Answer: (c)

Explanation: Cooperative learning leads to higher achievement and self-esteem in students. It also helps in developing a good understanding between the learners and the teacher.

Q58. Role-play activities help in

(a) Learning roles of famous people

(b) Keeping students engaged in the class

(c) Ensuring active participation of students in learning

(d) Giving importance to people who have done great work in the world

Answer: (c)

Explanation: By organising activities like role play, teachers ensure active participation of students that will foster a high level of energy and enthusiasm in the learning environment.

Q59. Which of the following helps in motivating the learners in a class?

(a) Maximum attendance in the class

(b) Remedial work is given by the teacher

(c) Questioning, experimenting and brainstorming

(d) Pin drop silence in the class

Answer: (c)

Explanation: If a teacher wants to motivate his/her class, he/she should consider using a combination of questioning, experimenting and brainstorming in the class during teaching.

Q60. While teaching a lesson on ‘food’ to the students of class VI, Ms. Renu asked the students to make a poster on ‘food for all. She kept observing the students while they were busy making the poster. She will assess the students on their

(a) Drawing

(b) Creativity

(c) Language

(d) All of the above

Answer: (b)

Explanation: The activity given by Ms. Renu can be used to assess the students on their understanding of the issue and creativity to express it through posters.

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