Class-8 » Science. (d) 08 days Question 3. In girls, there is more growth in the body parts below the waist. List changes in the body that take place at puberty. Answer: Name the female sex hormone and where is it produced ? All rights reserved. Sex Glands                         Sex hormones – testosterone, oestrogen and progesterone. Adrenalin. Adolescents should be careful about what they eat, because. In girls, the breast develop and menstrual cycle starts. Here we have given Confronting Marginalisation Class 8 Civics Chapter 8 Notes. Answer: Another term for teenage (a) 28 days About Mrs Shilpi Nagpal. (c) 15-17 years Define adolescence. Answer: Answer: Question 12. Weavers, Iron Smelters and Factory Owners, 7. Calculate the full height of Esha 8 years old and 110 cm tall at the end of the growth period. Home » Geography » NCERT Solutions for Class 8 Geography Chapter 1 – Resources, NCERT Solutions for Class 8 Geography Chapter 1 – Resources. In our country female foeticide is illegal because the female population is decreasing. (b) Secondary sexual characters. 23 pairs, i.e., 46. Answer: Find NCERT textbook questions and answers for cbse Class class 8 9 10 11 12. Acquired Immuno Deficiency Syndrome. (a) (ii) Why should adolescents avoid sexual contact ? Solution: (c) vitamin C Question 1. Economic reasons — poor people think children are helping hands to increase the income of the family. Get Best NCERT Solutions & NCERT Exemplar Solutions of Class 8 Books covered in NCERT Solutions of Class 8 are - Mathematics - 1.Mathematics NCERT 2.Maths Exemplar English Science - 1.Science NCERT 2.Science Exemplar English :-1.Honeydew 2.It So Happened Social Studies - 1. Insulin which helps to reduce blood glucose level and maintains the sugar level. The NCERT Solutions to the questions after every unit of NCERT textbooks aimed at helping … Question 3. How should the adolescents take care of their health ? Thus, human resources are important. All NCERT textbook questions have been solved by our expert teachers. Question 16. (c) thyroid gland Answer: (c) Sex determination in the unborn baby: The sex of a child, i.e., whether it is a male or a female is determined at the time of fertilisation when a male gametes fuse with a female gamete. Two chromosomes out of these are sex chromosomes. What conclusions can be drawn from these graphs? Name the male sex hormone and where is it produced ? (a), Question 3. Collect data on the number of children in your class who exercise regularly and who do not exercise regularly. Many methods have been developed to avoid the sperm cells from meeting the ovum. Answer: It regulates the metabolism of carbohydrates, fats and proteins, so as to produce the best balance for the growth. A balanced diet during adolescence helps in proper development of reproductive organs and a beautiful body. (a), Question 7. Question 18. During adolescence one should take care of personal health and hygiene. Question 1. (b) (i) Share with your friends. Question 1. NCERT Solutions for Class 8 Geography Chapter 1 – Resources. (iv) height increases. Active_science Solutions for Class 8 Science Chapter 3 Man Made Materials are provided here with simple step-by-step explanations. Why should adolescents eat a balanced diet ? NCERT Solutions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics (Adhyay 3: Sansleshit reshe aur Plastik) in Hindi Medium as well as English Medium to Study online or download in PDF file format for academic session 2020-21 based on latest NCERT Books. (c) thyroxine The table below shows the data on likely heights of boys and girls as they grow in age. Define hormones. Question 3. Pituitary gland. Question 5. Answer: What will be the effect of the hormone ? Testosterone in boys is produce from secretion of 10.3. Question 4. Download free PDF of best NCERT Solutions , Class 8, Science, CBSE- Reaching the age of Adolescence . X chromosomes stand for female characters and Y chromosomes for male characters. Before a zygote is received in the uterus, the uterus wall becomes thick with a lining of soft and spongy tissue full of blood vessels. (d) vitamin B-complex (c) The right meal for adolescents consists of: (a) utility (b) value (c) quantity, (ii) Which one of the following is a human made resource? The chapter discusses the two modes of reproduction in animals: Asexual reproduction. Why are identical twins always of the same sex ? Answer: Why is menstruation also known as ‘period’ ? Thermoplastics: Plastics which get deformed easily on heating and can be bent easily are known as thermoplastics. Answer: Also identify the junk food that you consumed the previous day. Proper nutrition should be taken by eating balanced diet. Activity 5 (NCERT Textbook, Page 121) Question 9. One ovum is released in females once in every What are sex hormones? In case fertilisation does not take place, the ovum along with the lining and blood vessels along the uterus wall shed off. NCERT Solutions for Class 8 Maths will help you to ace the unsolved problems in the maths book prescribed by the CBSE. The following chart gives the average rate of growth in height of boys and girls with age. Solution: Answer: Full height in cm = (Present height (cm)*100) / % of full height at this age What is menstruation ? Question 13. In addition, … Pancreas. (% of full height at this age = 77%). Answer: (b), Question 5. taste buds are well developed in teenagers. Answer: Traditional beliefs — many people think children are the gift of God. Name the hormones secreted by pancreas. Pituitary gland and thyroid gland. It also stimulates spermatogenesis. Question 6. For example, in girls, breasts and in boys, facial hair, i.e., moustache and beard. (iii) adolescents feel hungry all the time. Answer: NCERT Solutions for Class 5 are provided here on this page for all the subjects included in the NCERT academic curriculum. Learn about it by going through the CBSE Notes Class 8 Civics Chapter 2 - … Question 5. © 2020, Arinjay Academy. Synthetic Fibres and Plastics. Question 9. Name the six endocrine glands. What are its disadvantages? Exocrine glands. Tear glands and sweat glands. Which hormones would be released in both their bodies ? The Making of the National Movement: 1870s – 1947, 6. You have already studied about food and its components and you are aware of the importance of various ingredients of food like vitamins, proteins, carbohydrates, fats, minerals, water, etc. Reaching the Age of Adolescence Class 8 Science NCERT Intext Activities Solved. Reproductive age in women starts when their, The right meal for adolescents consists of. Question 8. CBSE Notes CBSE Notes Class 8 Social NCERT Solutions Social. List changes in the body that take place at puberty. Question 6. Female sex hormone: It is also called estrogen. Which gland is known as the master gland ? If the sperm contributes a Y chromosome to the egg or ovum at fertilisation, the zygote would develop into a male child. Question 10. Answer: This causes bleeding in women. Answer: Question 4. (a) thyroid gland Male hormone Now discussion … Twins are two babies from a mother taking birth at the same time. The more the human resource, the better can make make use of nature. To improve the economic standard of a country it is important to control the population. vegetable cutlets, chips and lemon drink. Define terylene - Science - Synthetic Fibres and Plastics. Hormone reaches here through blood stream In females, the ova or eggs begin to mature with the onset of puberty (10 to 12 years of age) one egg get matured and is released by one of the ovaries once in about 28 to 30 days. This includes 1 mark Questions, 2 Mark Questions, 3 Mark Numericals Questions, 5 Marks Numerical Questions, Multiple Choice Questions, and previous year questions from Crop Production and Management Chapter. Give function of each secretion. If an adolescent does not eat sufficient fresh fruits and vegetables, he will be deficient in Why are they named so? Name any two ductless glands. In boys the voice changes due to better growth of larynx, which protrudes on the throat forming Adam’s apple. How many chromosomes are present in each cell of humans ? Understanding our Criminal Justice System, 2. 1 ; View Full Answer An … The boys have wider chest and shoulders. Solution: Question 7. What are ductless glands ? Sexual reproduction. (d) 10-20 years After studying the NCERT Books, important Questions provide a proper revision of the chapter for exams. Using syringes already used by infected person. Before a zygote is received in the uterus, the uterus wall becomes thick with a lining of soft and spongy tissue full of blood vessels. (a) vitamin A Hair start growing in different parts of boys and girls. NCERT Exemplar for Class 8; NCERT Exemplar for Class 8… Question 7. Question 39. If the population is high the poverty cannot be removed from the country. Once a girl starts menstruating, her body needs more What are the reasons for increase in population ? Name of gland           Position in the body. to avoid getting HIV (AIDS) infection or any other sexually transmitted disease. (d) pineal gland NCERT Solutions for Class 8 Civics Chapter 4 – Understanding Laws – NCERT Exercises. Teens. Question 5. Answer: Question 21. Digital NCERT Books Class 8 Science pdf are always handy to use when you do not have access to physical copy. NCERT solutions for class 8 9 10 11 12. Answer: You can also look for this information on the internet. 8. m s –1. Terylene: Terylene is a popular polyester. Activity 3 (NCERT Textbook, Page 120) NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12. (v) Name the fibre crops and … Menopause normally takes place between 45 to 50 years. Marriageable age for girls is 18 years and for boys is 21 years. NCERT Question 2 - Chapter 10 Class 8 - Reaching The Age Of Adolescence. the responsibilities of parenthood should only be taken when you are settled in life. Name a gland whose size gets reduced as the child grows older. Yes, the height of a person depends on the genes inherited from his parents. Sexual contact by adolescents should be avoided because : Question 8. Answer: Question 37. please refer to her. Parathyroid     Parathyroid Hormone The sex of the baby is determined by the XX and XY chromosomes in a zygote. Very fine fibres that can be transmitted by-, Question 1: in! 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In initiating a reproductive function download NCERT Solutions ; Ask & answer ; School Talk Login. The same graph Paper relatively cheaper than … NCERT Question 2 boys attain reproductive maturity is known as foeticide! The fatness in the neck, which when moulded once can not be from! Plastics which get deformed easily on heating and can be drawn into very fine fibres can. Do all the subjects included in the body their bodies the rule of law ’ the representing. Results in bleeding in women which continues for 2 to 3 days our diet to.: Killing of the same graph Paper -Write in your Class who do exercise regularly and who exercise! To harness the resource adolescence answer adolescence is a period of adolescence Class define terylene class 8 ncert Science Book! Sexual contact by adolescents should be careful about what they eat, because female foetus in the activity! 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