This quiz works best with JavaScript enabled. Home > Class 10 > Class 10 Science Chapter 15 Our Environment – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 10 Science Chapter 15 Our Environment Quiz 4 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which country has emitted the most CO2 over time? In other words, which nation has the most responsibility for the greenhouse gases that are currently residing in the atmosphere? A) China. B) USA. C) Russia. D) India. E) Saudi Arabia. Show Answer Correct Answer: B) USA. 2. Ozone shields the surface of earth from: A) Infra red rays. B) UV rays. C) X-rays. D) All. Show Answer Correct Answer: B) UV rays. 3. Select man-made ecosystem A) Aquarium. B) Gardens. C) Both of these. D) None of these. Show Answer Correct Answer: C) Both of these. 4. In an ecosystem, the 10% of energy available for transfer from one trophic level to the next is in the form of ..... ? A) Heat energy. B) Chemical energy. C) Mechanical energy. D) Light energy. Show Answer Correct Answer: B) Chemical energy. 5. The main constituents of atmosphere are: A) N2 and O2. B) CO2 and N2. C) CO and CO2. D) More when bad. Show Answer Correct Answer: A) N2 and O2. 6. A ..... is considered a terrestrial ecosystem A) Ocean. B) Pond. C) Underground caves. D) Forest. Show Answer Correct Answer: D) Forest. 7. What might happen to the river basin system in your community if a factory continuously dumps toxins into the local river? A) Mutations will occur. B) The turbidity level will be low. C) Dissolved oxygen levels would be high. D) Thermal pollution will cause the temperature to increase. Show Answer Correct Answer: A) Mutations will occur. 8. Ecology is one of topic in Biology subject. What is exactly the main point of ecology? A) Intra-species and inter-species interaction. B) Behavior of organism as individual. C) Interaction between organisms and environment. D) Behavior of organisms in one population. Show Answer Correct Answer: C) Interaction between organisms and environment. 9. In the biosphere energy and matter move A) Both move unidirectionally. B) Both move circularly. C) Energy unidirectionally and matter circularly. D) Energy unidirectionally and matter unidirectionally. Show Answer Correct Answer: C) Energy unidirectionally and matter circularly. 10. What percentage of energy is passed on to next tropic level? A) 10%. B) 50%. C) 90%. D) 100%. Show Answer Correct Answer: A) 10%. 11. ASSERTION(A):Green plants of ecosystem are the transducers.REASON(R):Producers trap the radiant energy of the sun and convert it into chemical energy. A) Both A & R are true. R is the correct explanation of A. B) Both A & R are true. R is the incorrect explanation of A. C) A is true but R is false. D) A is false but R is true. E) Both A & R are false. Show Answer Correct Answer: A) Both A & R are true. R is the correct explanation of A. 12. In food chain, small carnivores fall at ..... level. A) 1 stem. B) Pear. C) An offer. D) Fth. Show Answer Correct Answer: C) An offer. 13. The very quick increase in the number of individuals in a population. A) Population Explosion. B) Sustainable Growth. C) Carrying Capacity. D) Overpopulation. Show Answer Correct Answer: D) Overpopulation. 14. Sun is known as the most important source of life in earth. Below there are sun's roles in energy flow, except A) Sunlight helps plant to liberate oxygen from water. B) Sunlight is the main source for plants to create sugar as food. C) Helping photosynthetic organisms converting inorganic matters to organic matter. D) Sun helps plant to do respiration. Show Answer Correct Answer: D) Sun helps plant to do respiration. 15. Omnivores belong to which trophic level of food chain A) Always T$_{2}$. B) Always T$_{3}$. C) Always T$_{4}$. D) May vary in their position. Show Answer Correct Answer: D) May vary in their position. 16. What is one of the greatest threats to biodiversity on Earth? A) Habitat destruction. B) Loss of drinking water. C) Decrease in food supply. D) Biomagnification. Show Answer Correct Answer: A) Habitat destruction. 17. What is the job of a decomposer? A) To break down dead plants and animals. B) Plants for animals to feed of from. C) Plants for animals to feed of from. D) To produce energy to the plants. Show Answer Correct Answer: A) To break down dead plants and animals. 18. Replacing of plastic cups by paper cups for selling tea on train is prefered because A) Paper cups are more aesthetic. B) Paper cups are more hygienic. C) Paper cups are cheaper. D) Paper cups are biodegradable and eco-friendly. Show Answer Correct Answer: D) Paper cups are biodegradable and eco-friendly. 19. What are the major causes of sea level rise? A) Melting glaciers and ice sheets. B) Rivers accelerating. C) Seawater expanding as it gets warmer. D) Rocks and soil washing into the sea. Show Answer Correct Answer: A) Melting glaciers and ice sheets. 20. The zone where life exists is known as ..... A) Biosphere. B) Lithosphere. C) Atmosphere. D) Hydrosphere. Show Answer Correct Answer: A) Biosphere. 21. Which of the following are parts of the atmosphere? A) Troposphere. B) Stratosphere. C) Thermosphere. D) All of the above. Show Answer Correct Answer: D) All of the above. 22. Chemical formula of ozone A) O. B) O1. C) O2. D) Be. Show Answer Correct Answer: D) Be. 23. ASSERTION:A network of food chains existing together in an ecosystem is known as food web.REASON:An animal like kite cannot be a part of food web. A) Both A & R are true. R is the correct explanation of A. B) Both A & R are true. R is the incorrect explanation of A. C) A is true but R is false. D) A is false but R is true. E) Both A & R are false. Show Answer Correct Answer: C) A is true but R is false. 24. All the interacting organisms in an area together with the non-living constituents of the environment form a/an ..... A) Ecosystem. B) Nature. C) Forest. D) City. Show Answer Correct Answer: A) Ecosystem. 25. An energy is passed from one trophic level to another, the amount of usable energy A) Increases. B) Decreases. C) Remains the same. D) Energy is not passed from one trophic level to another. Show Answer Correct Answer: B) Decreases. ← PreviousNext →Related QuizzesClass 10 Science Chapter 15 Our Environment Quiz 1Class 10 Science Chapter 15 Our Environment Quiz 2Class 10 Science Chapter 15 Our Environment Quiz 3Class 10 Science Chapter 15 Our Environment Quiz 5Class 10 Science Chapter 15 Our Environment Quiz 6Class 10 Science Chapter 15 Our Environment Quiz 7Class 10 Science Chapter 15 Our Environment Quiz 8Class 10 Science Chapter 15 Our Environment Quiz 9Class 10 Science Chapter 15 Our Environment Quiz 10Class 10 Science Chapter 15 Our Environment Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books