Our Environment MCQs Mock Test of 10th Class Science

Welcome to your Our Environment MCQs Mock Test of 10th Class Science

1. 
1. If a grasshopper is eaten by frog, then the energy transfer will be from :
2. 
2. Disposable plastics plates should not be used because ————–.
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3. The organisms of higher trophic level which feed on several types of organisms belonging to lower trophic level, constitute the—————–.
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4. Which of the following groups contain only biodegradable items ?
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5. Which is non biodegradable?
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6. In a given food chain the amount of energy at fourth trophic level is 5 KJ, what will be the energy at producer level ?
7. 
7. The excessive exposure of humans to UV rays results in :
8. 
8. What will happen if deer is missing from the food chain : grass → deer → Tiger ?
9. 
9. Which is incorrect:
10. 
10. The % of solar radiation absorbed by all green plants for photosynthesis is about ———–.
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11. The decomposers in ecosystem:
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12. The flow of energy in ecosystem :
13. 
13. In an ecosystem, the 10% of energy available for transfer from one trophic level to next is in the form of ____.
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14. Which of the following limits the number of trophic levels in a food chain?
15. 
15. Which of the following constitute the food chain?
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16. Which of the following are environment friendly practices?
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17. In a food chain, the third trophic level is always occupied by_____.
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18. An ecosystem includes _____.
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19. Accumulation of non-biodegradable pesticides in the food chain, in increasing amount at each higher trophic level is known as ______
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20. Which of the following is not an example of abiotic factors?
21. 
21.—– is a biodegradable pollutant .
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22. Which of the following is the terrestrial ecosystem?
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23. —- is an omnivore animal .
24. 
24. The formula of ozone is _____.
25. 
25. The number of atoms of oxygen in ozone______.
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26. In the food chain, herbivores fall at ____ level .
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27. In food chain, small carnivores fall at __ level.
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28. In trophic level, the greatest number is of _____.
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29. In food web, flow of energy is :
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30. Following is true for food web :
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31. Order of energy flow in ecosystem is :
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32. Ozone shields the surface of earth from :
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33. Which refrigerant is responsible for depletion of ozone layer
34. 
34. The constituent that does not form ecosystem is :
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35. The functional unit of environment
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37. 
37. Which is not an abiotic factor ?
38. 
38. _____ is a terrestrial ecosystem .
39. 
39. The microorganisms comprises of :
40. 
40. The organisms which synthesise carbohydrates from inorganic compounds using radiant energy are called :
41. 
41. What percentage of sunlight is captured by plants to convert into food energy ?
42. 
42. A detritus food chain begins with _____.
43. 
43. Which statement is incorrect :

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