Grade 6 Science Worksheet – Human Reproductive System (Cambridge Syllabus) | Age 12

Instructions

Read each question carefully and answer to the best of your ability. For multiple-choice questions, circle the letter of the best answer. For other sections, write your answer clearly in the space provided.

Part A: Objective Questions (40 Questions)

Circle the correct answer for each question.

1. Which part of the male reproductive system produces sperm?
1. Penis
2. Sperm duct
3. Testes
4. Scrotum


2. The female reproductive cell is called an:
1. Ovary
2. Ovum
3. Zygote
4. Sperm


3. Where does a baby (fetus) develop during pregnancy?
1. Oviduct
2. Ovary
3. Vagina
4. Uterus


4. The fusion of a sperm and an egg is called:
1. Ovulation
2. Menstruation
3. Fertilization
4. Gestation


5. In which part of the female reproductive system does fertilization usually take place?
1. Uterus
2. Oviduct (Fallopian tube)
3. Ovary
4. Vagina


6. The process of releasing a mature egg from the ovary is known as:
1. Puberty
2. Implantation
3. Ovulation
4. Menstruation


7. What is the name of the tube that carries sperm from the testes?
1. Urethra
2. Sperm duct
3. Oviduct
4. Uterus


8. The period of rapid growth and sexual maturation is called:
1. Childhood
2. Adulthood
3. Puberty
4. Infancy


9. Which of the following is a change that occurs in boys during puberty?
1. Hips widen
2. Menstruation begins
3. Voice deepens
4. Breasts develop


10. The structure that connects the fetus to the placenta is the:
1. Amniotic sac
2. Umbilical cord
3. Cervix
4. Oviduct

Complete each sentence with the correct word from the word bank.

11. The male reproductive cells are called _______________.
12. The period of development before birth is called pregnancy, and the developing baby is called a _______________ after about 8 weeks.
13. The _______________ are the male reproductive organs that produce sperm.
14. A fertilized egg is known as a _______________.
15. The monthly shedding of the uterus lining is part of the _______________ cycle.
16. The female reproductive organs that produce eggs are the _______________.
17. The fusion of male and female gametes is called _______________.
18. The organ that provides oxygen and nutrients to the growing fetus is the _______________.
19. The muscular organ where the fetus grows is the _______________.
20. The stage of life when a person's body becomes capable of reproduction is called _______________.

Write 'True' or 'False' for each statement.

21. A female is born with all the eggs she will ever have. _______________
22. Sperm are produced in the ovaries. _______________
23. The menstrual cycle lasts for about one week. _______________
24. Fertilization can only happen during ovulation. _______________
25. The uterus is also known as the womb. _______________
26. Both boys and girls experience the same changes during puberty. _______________
27. The umbilical cord carries waste away from the fetus. _______________
28. Only one sperm can fertilize an egg. _______________
29. Puberty begins at the same age for everyone. _______________
30. A pregnancy typically lasts for about 9 months. _______________

Match the term in Column A with its correct description in Column B.

31.____ 32.____ 33.____ 34.____ 35.____ 36.____ 37.____ 38.____ 39.____ 40.____

Part B: Short Answer Questions (20 Questions)

Write a brief answer for each question.

1. What is the main function of the male reproductive system?
2. What is the main function of the female reproductive system?
3. Name two parts of the female reproductive system.
4. Define puberty.
5. List two physical changes that happen to girls during puberty.
6. List two physical changes that happen to boys during puberty.
7. What happens during ovulation?
8. What is the purpose of the uterus lining thickening each month?
9. If an egg is not fertilized, what happens to it and the uterus lining?
10. What is a gamete? Give one male and one female example.
11. What is the function of the scrotum?
12. What is amniotic fluid and what is its purpose?
13. How does a fetus get its food and oxygen?
14. What is the difference between an embryo and a fetus?
15. Where does an embryo implant itself to grow?
16. What is the average length of a human pregnancy?
17. Why can't more than one sperm fertilize an egg?
18. Name the tube that carries both urine and sperm out of a male's body (though not at the same time).
19. What is the cervix?
20. After fertilization, what does the zygote develop into?

Part C: Problem Solving and Diagrams (10 Questions)

Use the diagrams and your knowledge to answer the questions.

        Oviduct (Fallopian Tube)
             [ A ]----,
                      |-----[ C ] (Uterus)
             [ A ]----'
         (Ovary) |
               [ B ] (Cervix)
                 |
               [ D ] (Vagina)

1. Identify the part labeled A. What is its function?
2. In which labeled part does fertilization typically occur? (Use the full name, not just the letter).
3. In which labeled part does the fetus develop? (Use the letter).
4. What process happens in part A that releases an egg cell?
5. What is the role of part D?

           (Sperm Duct)
             [ E ]----,
                      |-----[ G ]---> (Urethra in Penis)
             [ E ]----'
           (Sperm Duct)
                |
             [ F ] (Testis)

6. Identify the part labeled F. What does it produce?
7. What is the name of the tube labeled E?
8. Trace the path of sperm from where it is made to where it leaves the body, using the letters from the diagram.
9. A boy is born with undescended testes, meaning they have not moved into the scrotum. Why might this affect his ability to produce healthy sperm later in life? (Hint: Think about temperature).
10. Imagine a blockage in both tubes labeled E. How would this affect a man's ability to have children?

Answer Key

Part A: Objective Questions

1. c) Testes
2. b) Ovum
3. d) Uterus
4. c) Fertilization
5. b) Oviduct (Fallopian tube)
6. c) Ovulation
7. b) Sperm duct
8. c) Puberty
9. c) Voice deepens
10. b) Umbilical cord
11. sperm
12. fetus
13. testes
14. zygote
15. menstrual
16. ovaries
17. fertilization
18. placenta
19. uterus
20. puberty
21. True
22. False
23. False (The cycle is about 28 days; menstruation is one part of it).
24. True
25. True
26. False
27. True
28. True
29. False
30. True

Matching:
31. D, 32. E, 33. A, 34. B, 35. H, 36. I, 37. F, 38. G, 39. C, 40. J

Part B: Short Answer Questions

1. To produce sperm and deliver it to the female reproductive system.
2. To produce eggs, receive sperm, and provide an environment for a fertilized egg to develop.
3. Any two of: Ovaries, Oviducts (Fallopian tubes), Uterus, Vagina, Cervix.
4. The period of rapid growth and sexual development during which a person becomes capable of reproduction.
5. Any two of: Breasts develop, hips widen, menstruation begins, body hair grows.
6. Any two of: Voice deepens, shoulders broaden, facial/body hair grows, muscles develop.
7. A mature egg is released from one of the ovaries.
8. To prepare for a fertilized egg to implant and grow.
9. The egg breaks down and the uterus lining is shed during menstruation.
10. A gamete is a reproductive cell. Male example: sperm. Female example: ovum (egg).
11. To hold the testes outside the body and keep them at a slightly lower temperature, which is necessary for sperm production.
12. It is the fluid surrounding the fetus in the uterus. It protects the fetus from injury and helps regulate temperature.
13. Through the umbilical cord, which is connected to the placenta. The placenta transfers nutrients and oxygen from the mother's blood.
14. An embryo is the term for the developing human from fertilization until about the 8th week of pregnancy. A fetus is the term from the 8th week until birth.
15. In the wall of the uterus.
16. About 9 months (or 40 weeks).
17. Once a sperm penetrates the egg, the egg's outer layer changes, preventing other sperm from entering.
18. The urethra.
19. The lower, narrow part of the uterus that opens into the vagina.
20. It develops into an embryo.

Part C: Problem Solving and Diagrams

1. A is the ovary. Its function is to produce and store eggs (ova) and female hormones.
2. Fertilization occurs in the oviduct (Fallopian tube).
3. The fetus develops in part C (the Uterus).
4. Ovulation.
5. Part D (the Vagina) connects the uterus to the outside of the body. It receives sperm during intercourse and is the birth canal.
6. F is the testis. It produces sperm and male hormones (like testosterone).
7. E is the sperm duct (or vas deferens).
8. The path is F -> E -> G.
9. The testes need to be slightly cooler than the core body temperature to produce healthy sperm. If they remain inside the body, the higher temperature can impair sperm production.
10. A blockage in both sperm ducts would prevent sperm from leaving the testes and being ejaculated. This would cause infertility as the sperm could not reach the egg.