Examination on Basic Science
Class: JSS 2
Term: Third Term
Time: 1 Hour
Total Marks: 70

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

1. ________ is the transfer of heat from a hotter body to a colder body. (a) Light (b) Sound (c) Heat (d) Electricity
2. Heat transfer in liquids and gases occurs mainly through ________. (a) conduction (b) convection (c) radiation (d) insulation
3. Which of the following materials is a good conductor of heat? (a) Wood (b) Plastic (c) Copper (d) Air
4. The main reason for insulating houses in cold regions is to ________. (a) allow heat to escape (b) prevent heat loss (c) increase ventilation (d) make them look good
5. All of these are methods of heat transfer except ________. (a) conduction (b) convection (c) radiation (d) reflection
6. Which of these is NOT a primary source of heat energy? (a) Sun (b) Firewood (c) Electricity (d) Refrigerator
7. The correct step in stopping bleeding from a minor cut is to ________. (a) apply ice (b) apply direct pressure (c) wash with soap (d) apply a tourniquet
8. An example of a psychoactive drug is ________. (a) paracetamol (b) alcohol (c) vitamin C (d) antibiotics
9. Which of these is not a benefit of breastfeeding? (a) Provides antibodies (b) Reduces infant mortality (c) Is expensive to buy (d) Promotes mother-child bonding
10. The male reproductive organ responsible for producing sperm is the ________. (a) penis (b) testis (c) urethra (d) vas deferens
11. ________ is the fusion of male and female gametes. (a) Ovulation (b) Menstruation (c) Fertilization (d) Implantation
12. Which of the following is an inherited disease common in Nigeria? (a) Malaria (b) Typhoid (c) Sickle cell anaemia (d) Tuberculosis
13. Genetic counselling helps prospective parents to ________. (a) choose baby names (b) understand potential hereditary risks (c) plan their wedding (d) decide on school
14. All of these are symptoms of drug abuse except ________. (a) dilated pupils (b) improved academic performance (c) sudden mood swings (d) weight loss
15. Which is NOT a type of drug according to its effect on the body? (a) Stimulants (b) Depressants (c) Hallucinogens (d) Nutrients
16. The main reason for proper waste disposal is to prevent ________. (a) flooding (b) spread of diseases (c) air pollution (d) traffic jams
17. The process by which solid waste is converted into reusable materials is called ________. (a) incineration (b) landfilling (c) recycling (d) composting
18. Which of these is not a communicable disease? (a) HIV/AIDS (b) Measles (c) Diabetes (d) Tuberculosis
19. A person who is addicted to drugs is said to be a ________. (a) patient (b) counsellor (c) drug abuser (d) pharmacist
20. The period of development from conception to birth is known as ________. (a) puberty (b) adolescence (c) gestation (d) infancy
21. Which of the following is a female reproductive hormone? (a) Testosterone (b) Estrogen (c) Insulin (d) Adrenaline
22. The organ that produces eggs in females is the ________. (a) uterus (b) fallopian tube (c) ovary (d) vagina
23. ________ are substances that slow down the activities of the brain and nervous system. (a) Stimulants (b) Depressants (c) Hallucinogens (d) Narcotics
24. The primary aim of first aid is to ________. (a) replace medical treatment (b) provide immediate care to save life (c) diagnose illnesses (d) perform surgery
25. All of these are items found in a first aid box except ________. (a) bandage (b) antiseptic (c) pain relievers (d) microscope
26. Which is NOT a method of preventing the spread of communicable diseases? (a) Vaccination (b) Good hygiene (c) Eating junk food (d) Isolation
27. The transfer of heat through electromagnetic waves is called ________. (a) conduction (b) convection (c) radiation (d) absorption
28. ________ are substances that speed up the activities of the brain and nervous system. (a) Depressants (b) Stimulants (c) Hallucinogens (d) Sedatives
29. An example of a non-communicable disease is ________. (a) cholera (b) malaria (c) hypertension (d) polio
30. Which of the following is a characteristic of puberty in boys? (a) Broadening of hips (b) Deepening of voice (c) Growth of breasts (d) Menstruation
31. The main reason for proper ventilation in buildings is to ________. (a) keep the building dark (b) allow fresh air circulation (c) prevent noise (d) make it cooler
32. The process of burning waste materials at high temperatures is known as ________. (a) composting (b) recycling (c) incineration (d) landfilling
33. Which of these is not a common route of drug administration? (a) Oral (b) Injection (c) Topical (d) Telepathic
34. A person who inherits two identical alleles for a particular trait is said to be ________. (a) heterozygous (b) homozygous (c) dominant (d) recessive
35. The main function of the placenta during pregnancy is to ________. (a) produce hormones (b) protect the baby (c) exchange nutrients and waste (d) initiate labour
36. Which of the following methods of heat transfer is responsible for heating water in a pot? (a) Conduction (b) Convection (c) Radiation (d) Reflection
37. The term used to describe the total abstinence from sexual intercourse is ________. (a) contraception (b) abstinence (c) fertilization (d) gestation
38. All of these are negative effects of drug abuse except ________. (a) health problems (b) financial stability (c) social isolation (d) legal issues
39. The correct step in applying first aid to a burn is to ________. (a) apply oil (b) burst blisters (c) cool the burn with water (d) cover with cotton wool
40. Which of these is not a component of good personal hygiene? (a) Regular bathing (b) Wearing dirty clothes (c) Brushing teeth (d) Washing hands

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

1. (a) Define heat energy and state its S.I unit. (2 marks)
(b) Explain two differences between heat conductors and heat insulators, giving an example for each. (3 marks)
(c) Describe the process of heat transfer by convection, providing a practical example. (3 marks)
(d) State two factors that affect the rate of heat transfer by conduction. (2 marks)

2. (a) List two male and two female reproductive organs. (2 marks)
(b) Explain the importance of genetic counselling for couples planning to have children. (3 marks)
(c) Describe three changes that occur in boys during puberty. (3 marks)
(d) Differentiate between homozygous and heterozygous individuals. (2 marks)

3. (a) Define the term ‘drug abuse’. (2 marks)
(b) Give three reasons why people abuse drugs. (3 marks)
(c) Describe three negative effects of drug abuse on an individual. (3 marks)
(d) State two ways to prevent the spread of communicable diseases in a community. (2 marks)

4. (a) What is first aid? (2 marks)
(b) List three essential items found in a standard first aid box. (3 marks)
(c) Explain three benefits of proper waste management in our environment. (3 marks)
(d) State two immediate actions to take when someone sustains a minor burn. (2 marks)

Objective Marking Scheme

Question 1 – ✅ (c) Heat
Question