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Science MCQ

T3 CH4 Our Environment · Tamil Nadu Board STD 6 (Tamil - English Medium). 10 questions.

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10 questions · timed · auto-graded

MCQ 11 Mark
Usage of chemical pesticides and fertilisers causes ________ pollution.
  • A
    Air pollution
  • ✓
    Water pollution
  • C
    Noise pollution
  • D
    None of the above
Answer
Correct option: B.
Water pollution
Usage of chemical pesticides and fertilisers causes Water pollution.
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MCQ 21 Mark
It is an undesirable change that occurs in air and water
  • A
    Recycling
  • B
    Reuse
  • ✓
    Pollution
  • D
    Reduce
Answer
Correct option: C.
Pollution
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MCQ 61 Mark
The micro$-$organisms that obtain energy from the chemical breakdown of dead organisms is called
  • A
    consumers
  • ✓
    decomposers
  • C
    omnivores
  • D
    producers
Answer
Correct option: B.
decomposers
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MCQ 71 Mark
Plants are producers because they make their own food by _______
  • A
    Respiration
  • B
    Consumer
  • ✓
    Photosynthesis
  • D
    Decomposing
Answer
Correct option: C.
Photosynthesis
Photosynthesis
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MCQ 81 Mark
Ecosystems created and maintained by humans are called?
  • A
    lake
  • B
    river
  • ✓
    artificial ecosystem
  • D
    natural ecosystem
Answer
Correct option: C.
artificial ecosystem
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MCQ 91 Mark
An example for artificial aquatic ecosystem is _______
  • A
    Forest
  • B
    Pond
  • C
    Garden
  • ✓
    Aquarium
Answer
Correct option: D.
Aquarium
Aquarium
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MCQ 101 Mark
The ecosystem that originated without human intervention is called
  • ✓
    natural ecosystem
  • B
    artificial ecosystem
  • C
    aquarium
  • D
    terrarium
Answer
Correct option: A.
natural ecosystem
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MCQ - Science STD 6 Questions - Vidyadip