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Our Environment Science - Our Environment

CBSE - STD 10 - Science (CBSE - English Medium). 41 questions in this chapter.

Question types

Our Environment question types

41 questions across 5 question groups — pick any mix to generate a Science paper with step-by-step answer keys.

41
Questions
5
Question groups
5
Question types
Sample Questions

Our Environment questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1M.C.Q1 Mark
In a food chain, the third trophic level is always occupied by:
  • ✓
    Carnivores.
  • B
    Herbivores.
  • C
    Decomposers.
  • D
    Producers.

Answer: A.

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Q 2M.C.Q1 Mark
Depletion of ozone is mainly due to:
  • ✓
    Chlorofluorocarbon compounds.
  • B
    Carbon monoxide.
  • C
    Methane.
  • D
    Pesticides.

Answer: A.

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Q 3M.C.Q1 Mark
Which group of organisms are not constituents of a food chain?
  1. Grass, lion, rabbit, wolf.
  2. Plankton, man, fish, grasshopper.
  3. Wolf, grass, snake, tiger.
  4. Frog, snake, eagle, grass, grasshopper.
  • A
    $(i)$ and $(iii).$
  • B
    $(iii)$ and $(iv).$
  • ✓
    $(ii)$ and $(iii).$
  • D
    $(i)$ and $(iv).$

Answer: C.

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Q 4M.C.Q1 Mark
Excessive exposure of humans to $\ce{UV}-$ rays results in :
  1. Damage to immune system.
  2. Damage to lungs.
  3. Skin cancer.
  4. Peptic ulcers.
  • A
    $(i)$ and $(ii).$
  • B
    $(ii)$ and $(iv).$
  • ✓
    $(i)$ and $(iii).$
  • D
    $(iii)$ and $(iv).$

Answer: C.

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Q 9[1 Mark Questions]1 Mark
Select the mis-matched pair in the following and correct it.
a.
Biomagnification
Accumulation of chemicals at the successive trophic levels of a food chain.
b.
Ecosystem
Biotic components of environment.
c.
Aquarium
A man-made ecosystem.
d.
Parasites
Organisms which obtain food from other living organisms.
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