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

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

1. ________ is the excessive use of a substance, especially drugs, for non-medical purposes. (a) Drug control (b) Drug abuse (c) Drug prevention (d) Drug administration
2. The main reason for drug abuse among young people is often ________. (a) good health (b) peer pressure (c) academic success (d) family support
3. Which of these is a common physical effect of drug abuse on the body? (a) Strong bones (b) Stomach upset (c) Clear skin (d) Improved memory
4. Damaged nostrils and lungs are severe effects of abusing drugs, especially those that are ________. (a) swallowed (b) injected (c) inhaled (d) applied
5. An example of a coping skill to prevent drug abuse is ________. (a) isolating oneself (b) seeking professional help (c) ignoring problems (d) engaging in risky behaviours
6. The Nigerian agency responsible for regulating and controlling the manufacture, importation, exportation, advertisement, distribution, sale, and use of food, drugs, cosmetics, medical devices, bottled water, and chemicals is ________. (a) NDLEA (b) NAFDAC (c) FRSC (d) EFCC
7. Which of the following is a function of the National Drug Law Enforcement Agency (NDLEA)? (a) Regulating food products (b) Suppressing the illicit traffic in narcotic drugs (c) Controlling cosmetic production (d) Approving new medical devices
8. Misuse of herbal medicine can lead to ________. (a) quick recovery (b) improved health (c) adverse health effects (d) balanced diet
9. All of these are ways to prevent drug abuse except ________. (a) positive social interaction (b) healthy lifestyle (c) poor communication (d) coping skills
10. The transmission of characteristics from parents to offspring is known as ________. (a) evolution (b) adaptation (c) family traits (d) mutation
11. Which of these is an example of an inherited family trait? (a) Learning to ride a bicycle (b) Skin colour (c) Speaking English (d) Reading a book
12. A trait that is always expressed when present is called a ________ trait. (a) recessive (b) mutant (c) dominant (d) acquired
13. Albinism is a condition caused by a ________ trait. (a) dominant (b) acquired (c) recessive (d) learned
14. The study of family history and lineage is known as family ________. (a) genetics (b) genealogy (c) biology (d) anthropology
15. The importance of family traits includes understanding the inheritance of ________. (a) wealth (b) intelligence (c) social status (d) academic grades
16. Which is NOT a benefit of understanding family traits? (a) Identifying genetic diseases (b) Predicting future income (c) Understanding physical resemblance (d) Tracing family history
17. The washing away of the topsoil by natural agents like wind and water is defined as soil ________. (a) compaction (b) erosion (c) fertility (d) conservation
18. Which of the following is a major cause of soil erosion? (a) Planting trees (b) Building terraces (c) Overgrazing (d) Contour ploughing
19. The correct step in preventing soil erosion on farmland is ________. (a) continuous cropping (b) deforestation (c) cover cropping (d) bare soil exposure
20. All of these are control measures for soil erosion except ________. (a) terracing (b) afforestation (c) bush burning (d) contour farming
21. ________ is the deliberate setting ablaze of vegetation for various reasons. (a) Bush burning (b) Reforestation (c) Crop rotation (d) Irrigation
22. One of the environmental effects of bush burning is the ________. (a) enrichment of soil (b) destruction of natural habitats (c) increase in biodiversity (d) improvement of air quality
23. The main reason for regulations against bush burning is to ________. (a) encourage farming (b) protect the environment (c) promote hunting (d) clear land easily
24. Which of these is an economic effect of bush burning? (a) Increased rainfall (b) Loss of agricultural produce (c) Enhanced soil structure (d) Reduced air pollution
25. The pattern formed by rivers, streams, and lakes in a particular area is called a ________. (a) water cycle (b) drainage pattern (c) flood plain (d) water table
26. Excessive rainfall is a primary cause of ________. (a) drought (b) flooding (c) desertification (d) soil erosion
27. An example of a measure to prevent flooding in communities is ________. (a) building houses on floodplains (b) blocking drainage channels (c) proper waste disposal (d) cutting down trees near rivers
28. Which of the following is an effect of flooding on farmland? (a) Increased crop yield (b) Soil enrichment (c) Destruction of crops (d) Improved irrigation
29. The clearing of forests for other land uses is known as ________. (a) afforestation (b) reforestation (c) deforestation (d) conservation
30. The main reason for deforestation in many developing countries is ________. (a) commercial logging (b) improved air quality (c) increased biodiversity (d) soil conservation
31. Effects of deforestation on plants and animals include ________. (a) habitat creation (b) loss of biodiversity (c) increased food supply (d) climate stability
32. Which of these is not a regulation against deforestation? (a) Controlled logging (b) Reforestation programs (c) Unrestricted firewood collection (d) Establishment of forest reserves
33. ________ is the process by which fertile land becomes desert, typically as a result of drought, deforestation, or inappropriate agriculture. (a) Afforestation (b) Desertification (c) Urbanization (d) Industrialization
34. Geographical areas prone to desertification are often found in ________ regions. (a) temperate (b) polar (c) coastal (d) arid and semi-arid
35. The main cause of desertification in many areas is ________. (a) excessive rainfall (b) overgrazing (c) reduced temperatures (d) increased vegetation
36. Control measures for desertification include ________. (a) intensive farming (b) tree planting (c) bush burning (d) cutting down trees
37. The ozone layer is located in the Earth’s ________. (a) troposphere (b) stratosphere (c) mesosphere (d) thermosphere
38. The importance of the ozone layer is to ________. (a) trap heat for global warming (b) protect the Earth from harmful ultraviolet (UV) radiation (c) create greenhouse gases (d) increase ice melting
39. Which of the following is an effect of ozone depletion? (a) Reduced skin cancer (b) Global warming (c) Increased crop yield (d) Cooler temperatures
40. The regulation of ________ is a key control measure for ozone depletion. (a) carbon dioxide (b) methane (c) chlorofluorocarbons (CFCs) (d) oxygen

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

1. (a) Define drug abuse. (2 marks)
(b) List three physical effects of drug abuse on the human body. (3 marks)
(c) Explain two ways drug abuse can be prevented through positive social interaction. (3 marks)
(d) State two functions of NAFDAC in controlling drugs in Nigeria. (2 marks)

2. (a) What are family traits? (2 marks)
(b) Give three examples of inherited family traits. (3 marks)
(c) Differentiate between dominant and recessive traits, providing an example for each. (3 marks)
(d) Briefly explain the importance of family genealogy. (2 marks)

3. (a) Define soil erosion. (2 marks)
(b) Identify three human activities that cause soil erosion. (3 marks)
(c) Describe two methods for controlling soil erosion on farmlands. (3 marks)
(d) State two environmental effects of bush burning. (2 marks)

4. (a) What is deforestation? (2 marks)
(b) List three reasons why deforestation occurs. (3 marks)
(c) Explain two negative effects of deforestation on the environment. (3 marks)
(d) Suggest two control measures for desertification. (2 marks)

Objective Marking Scheme

Question 1 – ✅ (b) Drug abuse
Question 2 – ✅ (b) peer pressure
Question 3 – ✅ (b) Stomach upset
Question 4 – ✅ (c) inhaled
Question 5 – ✅ (b) seeking professional help
Question 6 – ✅ (b) NAFDAC
Question 7 – ✅ (b) Suppressing the illicit traffic in narcotic drugs
Question 8 – ✅ (c) adverse health effects
Question 9 – ✅ (c) poor communication
Question 10 – ✅ (c) family traits
Question 11 – ✅ (b) Skin colour
Question 12 – ✅ (c) dominant
Question 13 – ✅ (c) recessive
Question 14 – ✅ (b) genealogy
Question 15 – ✅ (b) intelligence
Question 16 – ✅ (b) Predicting future income
Question 17 – ✅ (b) erosion
Question 18 – ✅ (c) Overgrazing
Question 19 – ✅ (c) cover cropping
Question 20 – ✅ (c) bush burning
Question 21 – ✅ (a) Bush burning
Question 22 – ✅ (b) destruction of natural habitats
Question 23 – ✅ (b) protect the environment
Question 24 – ✅ (b) Loss of agricultural produce
Question 25 – ✅ (b) drainage pattern
Question 26 – ✅ (b) flooding
Question 27 – ✅ (c) proper waste disposal
Question 28 – ✅ (c) Destruction of crops
Question 29 – ✅ (c) deforestation
Question 30 – ✅ (a) commercial logging
Question 31 – ✅ (b) loss of biodiversity
Question 32 – ✅ (c) Unrestricted firewood collection
Question 33 – ✅ (b) Desertification
Question 34 – ✅ (d) arid and semi-arid
Question 35 – ✅ (b) overgrazing
Question 36 – ✅ (b) tree planting
Question 37 – ✅ (b) stratosphere
Question 38 – ✅ (b) protect the Earth from harmful ultraviolet (UV) radiation
Question 39 – ✅ (b) Global warming
Question 40 – ✅ (c) chlorofluorocarbons (CFCs)