Class 10 Science Our Environment? CBSE Questions & Answers

Class 10 · Science Our Environment?

This is Science class 10 Science Our Environment? CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Match the following with correct response. (1) Biodegradable (2) Non- biodegradable (3) Decomposers (4) Producers (A) Plastics, detergents, Pesticides etc (B) Green plants (C) Bacteria and Fungi(D) Dead parts of plants and animals
  • A
    1-C, 2-B, 3-D, 4-A
  • B
    1-B, 2-D, 3-A, 4-C
  • C
    1-A, 2-C, 3-B, 4-D
  • D
    1-D, 2-A, 3-C, 4-B
    Correct
2
match the following with correct response. (1) I Trophic level (2) II Trophic level (3) III Trophic level (4) IV Trophic level(A) Carnivore (B) Plants(C) Top carnivore (D) Herbivores
  • A
    1-D, 2-A, 3-C, 4-B
  • B
    1-B, 2-D, 3-A, 4-C
    Correct
  • C
    1-C, 2-B, 3-D, 4-A
  • D
    1-A, 2-C, 3-B, 4-D
3
Match the following with correct response. (1) Saprotrophs (2) Parasites (3) Autotrophs (4) Herbivores (A) Organisms obtaining food from green plants (B) Organisms obtaining food from host (C) Organisms obtaining food from dead plants and animals (D) Organisms which prepare their own food
  • A
    1-A, 2-C, 3-B, 4-D
  • B
    1-B, 2-D, 3-A, 4-C
  • C
    1-D, 2-A, 3-C, 4-B
  • D
    1-C, 2-B, 3-D, 4-A
    Correct
4
Match the following with correct response. (1) Tree (2) Grasshopper (3) Frog (4) Snake (A) Producer (B) Secondary consumer (C) Herbivore (D) Secondary carnivore
  • A
    1-D, 2-A, 3-C, 4-B
  • B
    1-C, 2-B, 3-D, 4-A
  • C
    1-B, 2-D, 3-A, 4-C
  • D
    1-A, 2-C, 3-B, 4-D
    Correct
5
Match the following with correct response. (1) Chlorofluorocarbons (2) Biomagnifications (3) 10% Percent law (4) Ecosystem (A) Increased concentration of non biodegradable chemicals (B) Biotic and abiotic factors (C) Energy reduce at each trophic level (D) Ozone depletion
  • A
    1-C, 2-B, 3-D, 4-A
  • B
    1-B, 2-D, 3-A, 4-C
  • C
    1-D, 2-A, 3-C, 4-B
    Correct
  • D
    1-A, 2-C, 3-B, 4-D
6
Match the following with correct response. (1) Ultimate source of energy (2) Unidirectional flow (3) Cyclic flow (4) Limitation of energy levels (A) Nutrients (B) Sun (C) 10% law (D) Energy
  • A
    1-B, 2-D, 3-A, 4-C
    Correct
  • B
    1-D, 2-A, 3-C, 4-B
  • C
    1-A, 2-C, 3-B, 4-D
  • D
    1-C, 2-B, 3-D, 4-A
7
Match the following with correct response. (1) A man- made ecosystem (2) A natural ecosystem (3) Scavengers (4) Recyclable waste (A) Paper, plastic bags, etc (B) Forest, Pond (C) Aquarium, Grassland (D) Housekeepers
  • A
    1-D, 2-A, 3-C, 4-B
  • B
    1-A, 2-C, 3-B, 4-D
  • C
    1-C, 2-B, 3-D, 4-A
    Correct
  • D
    1-B, 2-D, 3-A, 4-C
8
Match the following with correct response. (1) Chlorofluoro carbons (2) Green house gas (3) Biomagnifications (4) Trans ducers (A) Aerosols (B) DDT (C) Carbon dioxide (D) Green plants
  • A
    1-D, 2-A, 3-C, 4-B
  • B
    1-C, 2-B, 3-D, 4-A
  • C
    1-A, 2-C, 3-B, 4-D
    Correct
  • D
    1-B, 2-D, 3-A, 4-C
9
Match the following with correct response. (1) A biotic component (2) Biotic component (3) Ozone depletion (4) Eutrophication (A) Micro organisms (B) Kills aquatic life (C) Skin cancer (D) Light
  • A
    1-A, 2-C, 3-B, 4-D
  • B
    1-B, 2-D, 3-A, 4-C
  • C
    1-C, 2-B, 3-D, 4-A
  • D
    1-D, 2-A, 3-C, 4-B
    Correct
10
Excessive exposure of humans to U-V rays results in A. Damage to immune system B. Damage to lungs C. Skin cancer D. Peptic ulcers
  • A
    A and D
  • B
    A and C
    Correct
  • C
    B and C
  • D
    A and B
11
Which group of organisms are not constituents of a food chain?A. Grass, lion, rabbit, wolf B. Plankton, man, fish, grasshopper C. Wolf grass snake tiger D. Frog snake eagle grass grasshopper
  • A
    B and D
  • B
    All of these
  • C
    B and C
    Correct
  • D
    A and C
12
Habitat is the special environment of an organism in which-A. It lives B. It grows C. it breeds D. Gets food
  • A
    A and C
  • B
    A, B and C
  • C
    All of these
    Correct
  • D
    A and B
13
Which of the following belongs to the second trophic level?A. ProtozoaB. Small fish C. Grass hopper D. Snake
  • A
    A and C
  • B
    B and C
    Correct
  • C
    A, B and C
  • D
    All of these
14
Which of the following is terrestrial ecosystem? A. Forest B. Aquarium C. Grassland D. Desert
  • A
    A and D
  • B
    A, B and D
  • C
    All of these
    Correct
  • D
    A and B
15
Which of the following are the function of ecosystem?A. Energy flow B. Nutrients flow C. Gaseous flowD. All of these
  • A
    All of these
  • B
    B and D
  • C
    A and C
  • D
    A and B
    Correct