Here you are provided MCQ on our environment class 10 prepared by experienced faculty.
Biology class 10 chapter 15 is about our environment and ecosystem.
in the
Here most important MCQs have been provided so you can do better in your coming examination. To better understand the MCQ, you must go through NCERT Solutions class 10 science chapter 15 Our Environment.
MCQ on Our Environment Class 10
All MCQ on Our Environment Class 10
Science Biology Chapter 15 have been prepared according to the new pattern of
10 Board Examinations and completely based on the NCERT Science book of class 10.
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| MCQ on Our Environment Class 10 |
We have prepared MCQs with correct answers
so that you will be to understand the basic concept of questions.
The students can download MCQ Questions for Class 10 Science
Biology Chapter 15 in PDF format from the link given at the end.
Biology class 10 Chapter 15
Choose the correct answer of :
1. Biodegradable substance is
(a)glass bottle
(b)iron-nail
(c)paper cup
(d) none of above
Correct answer-
(c)
2. In a food chain, suppose the amount of energy of the fourth trophic level is 4kJ, what will be the energy available at the producer level-
(a)4000kJ
(b)400kJ
(c)40kJ
(d)4kJ
Correct answer- (a)
3. The gaseous component over the earth surface comprises
(a) atmosphere
(b) hydrosphere
(c) lithosphere
(d) no sphere
Correct answer-
(a)
4. Ecosystem is a system
containing livings and non-livings in which
(a) non-livings affect the livings
(b)livings affect the non-livings
(c) livings and non-livings both affect each
other
(d) all the above
Correct answer-
(c)
5. Accumulation of non-biodegradable pesticides in the food chain in large amounts
at each trophic level is known as-
(a)Pollution
(b)Biomagnification
(c)Accumulation
(d)None of above
Correct answer –(b)
6. The living components of a
biosphere are
(a) plants and animals
(b)plants only
(c)soil, water, air, and minerals
(d)light, temperature, humidity, and pressure
Correct answer-
(a)
7. The non-living components of
a biosphere are
(a) plants
(b) soil, water, air, and
minerals
(c) animals
(d) light, temperature,
humidity, and pressure
Correct answer-
(b)
8. In an ecosystem, the 10%
energy available for transfer from one trophic level to the next is in the form
of-
(a)Light energy
(b)Mechanical energy
(c)Chemical energy
(d)All above
Correct answer-(c)
9. The climate conditions are
(a)plants
(b) soil, water, air, and
minerals
(c) animals
(d) light, temperature,
humidity, and pressure
Correct answer-
(d)
10. The organisms that decompose
the dead bodies are
(a)producers
(b)decomposers
(c)predators
(d) consumers
Correct answer-
(b)
11. The organisms that prepare
their own food are
(a) producers
(b)decomposers
(c) predators
(d)consumers
Correct answer-
(a)
12. Flow of energy in an
ecosystem is always-
(a)In no specific direction
(b)Unidirectional
(c)In all directions
(d)Bidirectional
Correct answer-(b)
13. The organisms that use the
food prepared by others are
(a) producers
(b)decomposers
(c)predators
(d)consumers
Correct answer-
(d)
14. In a food chain, the third
trophic level is occupied by-
(a)Herbivores
(b)Carnivores
(c)Decomposers
(d)Producers
Correct answer –(b)
15. In the following groups of
materials which group /groups contain only non-biodegradable items-(i).
(i)Polythene,PVC, detergent
(ii)Plastic,grass, iron
(iii)DDT, plastic,wod
(iv)Grass, wood,paper
(a)(i)
(b)(ii)
(c)(i) and (ii)
(d)(vi)
Correct answer-(a)
16.Green plants are
(a)consumers
(b)decomposers
(c)autotrophs
(d)heterotrops
Correct answer-
(c)
17. Which one of the following
is an artificial ecosystem-
(a)Crop field
(b)Pond
(c)Forest
(d)Lake
Correct answer- (a)
18.Man is
(a)producer
(b)decomposers
(c)autotrophs
(d) heterotrops
Correct answer-
(d)
19. Which of the following
statement is incorrect
(a)Green plants get their foods
from organic compounds
(b)Green plants are producers
(c)Green plants convert solar
energy into chemical energy
(d)Green plants prepare food
from inorganic compounds
Correct answer-(a)
20. The example of herbivorous
is
(a) snake
(b) lion
(c) tiger
(d)deer
Correct answer-
(d)
21. The example of carnivorous
is
(a) mouse
(b)rabbit
(c) hawk
(d) heterotrophs
Correct answer-
(c)
22. Solar energy enters a
food chain through
(a) autotrophs
(b)herbivores
(c) carnivores
(d)decomposers
Correct answer-
(a)
23. Only .......... % of solar
energy is trapped by green plants
(a) 10
(b) 5
(c) 2
(d)1
Correct answer-
(d)
24. A food chain comprises frog,
snake, grass, and grasshopper the organism at the third trophic level is
(a)grass
(b)grasshopper
(c) frog
(d) snake
Correct answer-
(c)
25. A food chain comprising
birds, green plants, fish, and man. The concentration of any harmful chemical
entering the food chain will be maximum, in
(a)fish
(b)birds
(c) green plants
(d) man
Correct answer-
(d)
26. Ozone is a/ an
(a)isotope of oxygen
(b)allotrope of oxygen
(c)isomer of oxygen
(d)all the above
Correct answer-
(b)
27. Ozone layer prevents the
entry of.......... into the atmosphere
(a) infrared radiation
(b) visible
light
(c) ultraviolet radiation
(d) all
the above
Correct answer-
(c)
28. Examples of artificial
ecosystems are
(a) ponds and lakes
(b)gardens and crop fields
(c) seas and oceans
(d)forest and grasslands
Correct answer-
(b)
29. A food chain always starts
from
(a) herbivores
(b)producers
(c)carnivores
(d)decomposers
Correct answer-
(b)
30. Only .......... % of energy
is available at each successive trophic level
(a)10
(b)5
(c) 2
(d) 1
Correct answer-
(a)
31. In a food chain, the transfer of energy from one tropic level to
the next tropic level takes place in the form of
(a) mechanical energy
(b)heat energy
(c)chemical energy
(d)light energy
Correct answer-
(c)
32. Flow of energy in a food
chain is
(a) unidirectional
(b)bidirectional
(c) multidirectional
(d)no definite direction
Correct answer-
(a)
33. Organisms of a higher
trophic level that feed on several organisms of lower trophic level form the
(a) food chain
(b)ecosystem
(c)ecological pyramid
(d)food web
Correct answer-
(d)
34. Which group of the organisms
cannot constitute a food chain
(a) grass, deer, tiger
(b) grass, snake, wolf
(c) hawk, plants, snake, insect, frog
(d) phytoplankton, snake,
frog, insects
Correct answer-
(b)
35. What will happen if deer is
missing in the food chain
Plants → deer →
tiger
(a) plants will decrease
(b) tiger will increase
(c) the population of tigers will decrease and the population of plants will increase
(d) no change will be
Correct answer-
(c)
36. If lion eats a deer, the
transfer of energy is from
(a) first trophic level to second trophic level
(b)second trophic level to
third trophic level
(c)third trophic level to fourth trophic level
(d)third trophic level to second trophic level
Correct answer-
(b)
37. Accumulation of
non-biodegradable pesticides in the food chain in an increasing amount at each
higher trophic level is called
(a)accumulation
(b) bio geochemical cycle
(c) biomagnification
(d) biosphere
Correct answer-
(c)
38. Depletion of the ozone layer is
mainly due to
(a) pesticides
(b)use of fossil fuels
(c)chloro carbons
(d)chlorofluoro carbons
Correct answer-
(d)
39. Excessive exposure to
UV-rays can cause in human-beings
(i) skin cancer
(ii)peptic ulcer
(iii) damage to the immune system
(iv) AIDS
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (i),
(iii) and (iv)
Correct answer-
(d)
Class 10 science chapter 15 Our Environment fill in the blanks
Here you are provided with important fill-in-the-blanks of Class 10 Science
Chapter 15 which are also very useful in the context of the new pattern of CBSE
Class Board Exams 2021-22.
Fill in the blanks our environment
1. Enzymes are ............... in their action.
2.……………….shield checks the entry of Ultraviolet
rays onto the earth.
3. Plastics are ............... substances.
4. Chlorofluorocarbons are responsible for the depletion of ............... layer.
5……………………..is the
burning of wastes at a very high temperature in presence of Oxygen.
6. Cow dung is a ............... waster.
7. Ozone layer prevents ...............
radiation to reach the surface of the earth.
8. When DDT enters a food chain, it leads to……………………
9. The gaseous component over the earth
surface is called ...............
10. Substances that are broken down by
biological processes are called ............... substances.
11. The non-living components of an ecosystem
are air, water, soil and ...............
12. The factors such as light, temperature
............... and pressure are climatic conditions.
13. The organisms that prepare their own food
are called ...............
14. The organisms that depend on others for their
food are called ...............
15. According to the mode of nutrition, we are
...............
16. Flow of energy is …………………………in an
ecosystem.
17. Both biotic and abiotic components
............... each other.
18. The organisms that synthesize food are
called ...............
19. The organisms that consume food are called
...............
20. Decomposers are organisms that ...............
the dead bodies of plants and animals.
21. Grass and buffalo are the producers and
............... respectively.
22. Bacteria and ............... are
decomposers.
23. The living components of the biosphere are
of three types which are ..............., ............... and ...............
24. Each step of a food chain is called a ………………………..
25. A sequence showing food consumption in an
ecosystem or biosphere is called ...............
26. The different levels at which transfer of
food (energy) takes place are called ...............
27.“Grass → deer → lions” is one example of
...............
28. The plants are ............... in the food
chain.
29. The consumers are of three types,
herbivores, carnivores, and ...............
30. The ............... of different
food-chains is termed as food web.
31. Rat and snake show a ............... and
predator relationship.
32. If we consume plants, the food chain
involves only............... and consumer.
33. If we are carnivores, the food chain involves only ............... and ..............
34. Energy from the environment enters the
living components through ...............
35. Only ............... % of the sun’s total energy
reaching the earth is used by green plants in photosynthesis.
36. Plants trapping solar energy, store in the
form of Only ............... % of sun’s total energy.
37. At each level............... % of the
energy is used by the living beings on their metabolic activities and growth.
38. Really green plants are not producers, but
Only ............... % of the sun’s total energy.
39. At each level energy available is
............... % of the previous level.
40. If an animal is away from the producer,
means............... availability of energy.
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