Man and His Environment

Biology, SSC-KPK Class 10. This chapter is split into 47 topics and has 1,087 practice questions. The topics covered are listed below, followed by 10 free sample questions from the chapter.

Topics in this chapter

1. Balance in the Ecosystem and Human Impact 23 questions
2. Predation and Predator Plants 23 questions
3. Food Webs 24 questions
4. Abiotic Components: Soil, Fire and Gravity 22 questions
5. Carbon Cycle 24 questions
6. Deforestation: Meaning, Importance of Forests and Causes 22 questions
7. Water Pollution: Herbicides, Fertilizers, Landfills and Other Sources 20 questions
8. Biogeochemical Cycles and Ecological Balance 20 questions
9. Control of Water Pollution 21 questions
10. Acid Rain 24 questions
11. Biotic Components: Producers 22 questions
12. Pyramid of Biomass 22 questions
13. Nitrogen Cycle: Stages, Fixation and Uptake 24 questions
14. Pak-EPA and Conservation of Nature 21 questions
15. Other Ways for Conservation of Nature and the Waste Paper Tidbit 21 questions
16. Energy Relations between Trophic Levels (10% Rule) 22 questions
17. Symbiosis and Parasitism 26 questions
18. Key Points of Unit 16 24 questions
19. Control of Air Pollution 25 questions
20. Overpopulation and Extensive Agriculture 23 questions
21. Abiotic Components: Sunlight and Water 23 questions
22. Exercise A: Select the Correct Answer (Unit 16) 22 questions
23. Environment and Levels of Ecological Organisation 27 questions
24. Conservation of Nature: Importance and Objectives 22 questions
25. Mutualism and Commensalism 25 questions
26. Effects of Air Pollution and Sewage Pollution of Water 22 questions
27. Methods of Conservation: Reduce, Reuse and Recycle 25 questions
28. Activities and Science, Technology and Society Box (Unit 16) 20 questions
29. Nitrogen Cycle: Nitrification, Denitrification and Fig. 16.12 25 questions
30. Ozone Layer Depletion and Ultraviolet Rays 22 questions
31. Flow of Energy in the Ecosystem 24 questions
32. Interactions in the Ecosystem: Competition 22 questions
33. Abiotic Components: Temperature, Atmosphere and Wind 26 questions
34. Pollution and Air Pollutants 25 questions
35. Control of Land Pollution 23 questions
36. Urbanisation 24 questions
37. Land Pollution and its Causes 23 questions
38. Deforestation: Effects on the Environment 21 questions
39. Water Pollution: Oil Spills, Industrial Effluent and Insecticides 23 questions
40. Decomposers and Interrelationships among Components 22 questions
41. Global Warming and the Greenhouse Effect 25 questions
42. Food Chains and Trophic Levels 25 questions
43. Pyramid of Numbers 23 questions
44. Exercise B and C: Short and Long Question Themes (Unit 16) 25 questions
45. Habitat, Niche, Biomes and the Biosphere 22 questions
46. Biotic Components: Consumers 25 questions
47. Flow of Materials and Comparison with Flow of Energy 23 questions

Sample questions: Man and His Environment

10 sample questions with the correct answer and an explanation. Try to answer each one before reading the explanation.

Q1. Which list contains only abiotic components named in the text?

• A. sunlight, water, temperature, soil, air, humidity(correct answer)
• B. bacteria, fungi, algae, humidity, soil
• C. producers, soil, pH, rabbits
• D. humidity, grass, lions, sunlight

Answer: A.Sunlight, water, temperature, soil, air, humidity, pH, salinity, nitrogen availability and precipitation are abiotic.

Q2. Which of the following is NOT a factor listed as a major abiotic component of the ecosystem in this section?

• A. sunlight
• B. producers(correct answer)
• C. gravity
• D. water

Answer: B.Producers are biotic. The numbered abiotic factors are sunlight, water, temperature, atmosphere and wind, soil and gravity.

Q3. Which of the following labels appears in Fig. 16.11?

From your book: Figure 16.11 (page 129) Full page Open book

• A. denitrification
• B. ocean uptake(correct answer)
• C. volatilization
• D. leaching loss

Answer: B.Fig. 16.11 includes ocean uptake, photosynthesis, plant and animal respiration, decaying organisms, factory and vehicle emissions and fossils.

Q4. How many effects of air pollution are listed as bullet points in the text?

• A. ten
• B. eight(correct answer)
• C. six
• D. five

Answer: B.The bullets are reduced lung function, irritation, respiratory disease, reduced energy, headaches and dizziness, disruption of body systems, cardiovascular problems and cancer.

Q5. How many causes of water pollution (a to i) are listed in the text?

• A. eight
• B. nine(correct answer)
• C. seven
• D. ten

Answer: B.(a) sewage, (b) oil spills, (c) industrial effluent, (d) insecticides, (e) herbicides, (f) fertilizers, (g) landfills, (h) animal wastes, (i) petroleum leakage.

Q6. Sustainable development means:

• A. no development
• B. only industrial development
• C. development at any cost
• D. development that meets present needs without harming future generations(correct answer)

Answer: D.The conservation definition and Pak-EPA statement refer to sustainable development, meeting present and future needs.

Q7. Conservation of natural resources is very essential for ensuring:

• A. more pollution
• B. fewer plants
• C. a decrease in resources
• D. a continuous yield of plants and animals and materials for the fast growing human population(correct answer)

Answer: D.The text says this. The correct answer is: a continuous yield of plants and animals and materials for the fast growing human population.

Q8. How many objectives of conservation of nature (bullets) are listed in the text?

• A. ten
• B. six
• C. eight(correct answer)
• D. five

Answer: C.Protection of species, prevent extinction, stable ecosystem, minimise pollution, marine life, forests, tourism, employment.

Q9. The Key Points define biogeochemical cycles as:

• A. back and forth movements of chemical elements between organisms and environment along circular paths(correct answer)
• B. one-way flow of energy
• C. flow of water only
• D. pyramid of numbers

Answer: A.The key point. The correct answer is: back and forth movements of chemical elements between organisms and environment along circular paths.

Q10. STS item 5 asks students to design:

• A. a nitrogen cycle
• B. a campaign against pollution in their area, with key messages and reasons for priorities(correct answer)
• C. a new species
• D. a food web

Answer: B.The fifth STS item. The correct answer is: a campaign against pollution in their area, with key messages and reasons for priorities.