Examination on Basic Science
Class: JSS 3
Term: Third Term
Time: 1 Hour
Total Marks: 70

SECTION A: OBJECTIVES (40 Marks)
Instruction: Answer all questions.

1. ________ is defined as pregnancy occurring in females below the age of 20 years. (a) Early marriage (b) Teenage pregnancy (c) Adolescent fertility (d) Childbearing
2. Which of the following is an implication of teenage pregnancy? (a) Improved academic performance (b) High rate of school dropouts (c) Enhanced social status (d) Financial independence
3. Which of these is NOT a method of avoiding teenage pregnancy? (a) Abstinence (b) Comprehensive sex education (c) Early marriage (d) Parental guidance
4. Which of these is not a danger of radioactive rays? (a) Cancer (b) Genetic mutation (c) Burns (d) Enhanced vision
5. The type of abortion that occurs naturally without any medical intervention is called ________ abortion. (a) Induced (b) Spontaneous (c) Therapeutic (d) Criminal
6. All of these are types of simple machines except ________. (a) Lever (b) Engine (c) Pulley (d) Inclined plane
7. The main reason for unsafe abortion is ________. (a) Lack of awareness (b) Illegal status in many places (c) High cost (d) Medical complications
8. Radioactivity is the process by which unstable atomic nuclei lose energy by emitting ________. (a) Electrons (b) Photons (c) Radiation (d) Protons
9. An example of a radioactive element is ________. (a) Iron (b) Uranium (c) Carbon (d) Oxygen
10. The correct step to prevent teenage pregnancy is ________. (a) Encouraging early sexual activity (b) Promoting drug abuse (c) Providing proper sex education (d) Ignoring parental advice
11. A common myth about pregnancy is that ________. (a) A woman can get pregnant only once a month (b) Pregnancy is always planned (c) All pregnancies lead to live births (d) Drinking cold water during pregnancy causes miscarriage
12. Ethical issues in science refer to the ________ principles that guide scientific research and development. (a) Financial (b) Political (c) Moral (d) Economic
13. Which of the following is a wrong application of science? (a) Developing vaccines (b) Creating bioweapons (c) Improving communication technology (d) Advancing space exploration
14. The ability of a simple machine to multiply force is known as its ________. (a) Efficiency (b) Mechanical advantage (c) Velocity ratio (d) Work done
15. Which type of radiation has the highest penetrating power? (a) Alpha rays (b) Beta rays (c) Gamma rays (d) X-rays
16. One major implication of bad scientific practices is ________. (a) Increased public trust (b) Harm to society and environment (c) Faster technological advancement (d) Reduced research funding
17. The use of radioactivity in medicine includes ________. (a) Sterilizing food (b) Power generation (c) Cancer treatment (d) Carbon dating
18. Which is NOT a consequence of unsafe abortion? (a) Severe bleeding (b) Infertility (c) Improved health (d) Infections
19. Simple machines are devices that make work easier by changing the direction or ________ of a force. (a) Speed (b) Mass (c) Magnitude (d) Weight
20. Teenage pregnancy often leads to ________ health risks for both the mother and the baby. (a) Minimal (b) Significant (c) No (d) Temporary
21. ________ is the deliberate termination of a pregnancy before the fetus is viable. (a) Conception (b) Fecundation (c) Abortion (d) Ovulation
22. Which of these simple machines works on the principle of a pivot or fulcrum? (a) Pulley (b) Wedge (c) Lever (d) Screw
23. The adverse effects of bad scientific practices can include ________ problems for humans. (a) Educational (b) Health (c) Recreational (d) Financial
24. A fact about pregnancy is that ________. (a) All women experience morning sickness (b) Pregnancy can occur even with contraception (c) Gender of the baby can be chosen (d) Exercise is harmful during pregnancy
25. One way to prevent abortion is through ________. (a) Encouraging unprotected sex (b) Access to family planning services (c) Promoting ignorance (d) Discouraging education
26. The type of radiation that consists of fast-moving electrons is ________. (a) Alpha (b) Beta (c) Gamma (d) Neutron
27. ________ is an example of an ethical issue in scientific research. (a) Funding research (b) Plagiarism (c) Publishing results (d) Collaborating with other scientists
28. Which of the following is a common use of a pulley? (a) Cutting wood (b) Lifting heavy objects (c) Holding doors (d) Prying open lids
29. The unit used to measure the activity of a radioactive substance is the ________. (a) Watt (b) Joule (c) Becquerel (d) Newton
30. Implication of teenage pregnancy on the family includes ________. (a) Increased family income (b) Strain on family resources (c) Reduced family responsibilities (d) Improved family reputation
31. Which of these is NOT a type of abortion? (a) Spontaneous abortion (b) Induced abortion (c) Natural abortion (d) Therapeutic abortion
32. The main danger of alpha particles is their ________. (a) High penetrating power (b) Strong ionizing ability (c) Long range (d) Low mass
33. Wrong application of science can lead to ________ degradation. (a) Economic (b) Social (c) Political (d) Environmental
34. A simple machine that is essentially an inclined plane wrapped around a cylinder is a ________. (a) Wedge (b) Lever (c) Screw (d) Wheel and axle
35. Seeking help for an unwanted pregnancy can involve ________. (a) Ignoring the situation (b) Consulting a trusted adult or counselor (c) Self-medication (d) Keeping it a secret
36. Which of these radioactive elements is commonly used in nuclear power plants? (a) Gold (b) Uranium (c) Lead (d) Aluminium
37. The social implication of teenage pregnancy includes ________. (a) High self-esteem (b) Stigmatization (c) Career advancement (d) Financial stability
38. All of these are reasons for induced abortion except ________. (a) Unwanted pregnancy (b) Medical necessity (c) Rape (d) Planned parenthood
39. The main purpose of a simple machine is to ________. (a) Increase the amount of work done (b) Reduce the amount of work done (c) Make work easier (d) Increase friction
40. ________ is a serious ethical concern in genetic engineering. (a) Gene sequencing (b) Human cloning (c) DNA profiling (d) Crop modification

SECTION B: THEORY (30 Marks)
Instruction: Answer any THREE questions.

1. (a) Define teenage pregnancy. (2 marks)
(b) State three (3) implications of teenage pregnancy on the girl-child. (3 marks)
(c) Differentiate between a myth and a fact about pregnancy, giving one example for each. (3 marks)
(d) List two (2) methods of avoiding teenage pregnancy. (2 marks)

2. (a) What is abortion? (2 marks)
(b) Describe two (2) types of abortion. (3 marks)
(c) Explain three (3) consequences of unsafe abortion. (3 marks)
(d) State two (2) ways to prevent abortion. (2 marks)

3. (a) Define radioactivity. (2 marks)
(b) List three (3) radioactive elements. (3 marks)
(c) Compare and contrast any two (2) types of radiation based on their penetrating power. (3 marks)
(d) State two (2) uses of radioactivity in our daily lives. (2 marks)

4. (a) What are ethical issues in science? (2 marks)
(b) Give two (2) examples of wrong applications of science. (3 marks)
(c) Discuss three (3) implications of bad scientific practices on society. (3 marks)
(d) List two (2) adverse effects of unethical scientific development on the environment. (2 marks)

5. (a) Define a simple machine. (2 marks)
(b) Give three (3) examples of simple machines. (3 marks)
(c) Explain how simple machines make work easier. (3 marks)
(d) State two (2) uses of simple machines in the home. (2 marks)

Objective Marking Scheme
Question 1 – ✅ (b) Teenage pregnancy
Question 2 – ✅ (b) High rate of school dropouts
Question 3 – ✅ (c) Early marriage
Question 4 – ✅ (d) Enhanced vision
Question 5 – ✅ (b) Spontaneous
Question 6 – ✅ (b) Engine
Question 7 – ✅ (b) Illegal status in many places
Question 8 – ✅ (c) Radiation
Question 9 – ✅ (b) Uranium
Question 10 – ✅ (c) Providing proper sex education
Question 11 – ✅ (d) Drinking cold water during pregnancy causes miscarriage
Question 12 – ✅ (c) Moral
Question 13 – ✅ (b) Creating bioweapons
Question 14 – ✅ (b) Mechanical advantage
Question 15 – ✅ (c) Gamma rays
Question 16 – ✅ (b) Harm to society and environment
Question 17 – ✅ (c) Cancer treatment
Question 18 – ✅ (c) Improved health
Question 19 – ✅ (c) Magnitude
Question 20 – ✅ (b) Significant
Question 21 – ✅ (c) Abortion
Question 22 – ✅ (c) Lever
Question 23 – ✅ (b) Health
Question 24 – ✅ (b) Pregnancy can occur even with contraception
Question 25 – ✅ (b) Access to family planning services
Question 26 – ✅ (b) Beta
Question 27 – ✅ (b) Plagiarism
Question 28 – ✅ (b) Lifting heavy objects
Question 29 – ✅ (c) Becquerel
Question 30 – ✅ (b) Strain on family resources
Question 31 – ✅ (c) Natural abortion
Question 32 – ✅ (b) Strong ionizing ability
Question 33 – ✅ (d) Environmental
Question 34 – ✅ (c) Screw
Question 35 – ✅ (b) Consulting a trusted adult or counselor
Question 36 – ✅ (b) Uranium
Question 37 – ✅ (b) Stigmatization
Question 38 – ✅ (d) Planned parenthood
Question 39 – ✅ (c) Make work easier
Question 40 – ✅ (b) Human cloning