Our Environment MCQ Questions Class 10 Science Chapter 15
NCERT MCQ Questions for Class 10 Science Chapter 15 Our Environment. Our Environment MCQ Questions with Answers from Class 10 Science.
Our Environment MCQ Questions Class 10 Science Chapter 15
Our Environment Multiple Choice Questions with Answers Class 10 Science Chapter 15 PDF is available.
1) _____ can be defined as study of environment, living organisms and interaction among them.
a) Ecology
b) Ecosystem
c) Edaphic
d) none of these
Ans. a)
Explanation: Ecology is the study of interaction between the environment and living organisms.
2) Which is not an abiotic component?
a) Rain
b) light
c) wind
d) producers
Ans. d)
Explanation: Producers are biotic components.
3) Plants divided depending on the availability of water are
a) hydrophytes
b) mesophytes
c) xerophytes
d) all of the above
Ans. d)
Explanation: Plants are divided into 3 types on the basis pf availability of water are hydrophytes, mesophytes and xerophytes.
4) In which type of rainfall does mesophytes grow?
a) acute
b) moderate
c) less
d) high
Ans. b)
Explanation: The mesophytes grow in moderate type of rainfall.
5) ___ is defined as the structure and properties of a particular area.
a) Ecology
b) Environment
c) Topography
d) edaphic
Ans. c)
Explanation: Topography is the study of structure and properties of a particular area.
6) Which is not a biotic component among the following:
a) soil
b) herbivore
c) autotrophs
d) carnivore
Ans. a)
Explanation: Soil is an abiotic component.
7) Animals that feed on other animals are called _____.
a) autotrophs
b) carnivore
c) omnivore
d) herbivore
Ans. b)
Explanation: Carnivores depend on or feed on other plant eating organisms are called carnivores.
8) ____ are the organisms which feed on dead plant.
a) Coprophages
b) Necrophages
c) Geophages
d) Saprophages
Ans. d)
Explanation: Saprophages are the organism which feed on dead plant.
9) ____ the temperature, higher would be the decomposition.
a) lower
b) moderate
c) higher
d) slower
Ans. c)
Explanation: decomposition depends on the temperature, higher the temperature, higher is the rate of decomposition.
10) Geophages feed on dead organic matter present ____.
a) plants
b) in soil
c) in the body
d) on surface
Ans. d)
Explanation: Geophages feed on dead organic matter present on the surface.
11)
The lion in the above picture is ____.
a) producer
b) herbivore
c) carnivore
d) omnivore
Ans. c)
Explanation: Lion is a carnivore who feeds on flesh of other animals.
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12)
Which are the carnivores in the above diagram?
a) frog
b) snake
c) eagle
d) all of the above
Ans. d)
Explanation: Frog eats butterfly, snake eats frog and eagle eats snale so they all are carnivores.
13) Name the animals which are at the tertiary trophic level?
a) omnivores
b) carnivores
c) herbivores
d) producers
Ans. a)
Explanation: Omnivores are also called as tertiary trophic level.
14) Primary trophic level organisms are as follows
a) BGA
b) green algae
c) green plants
d) all of the above
Ans. d)
Explanation: Primary trophic level examples are BGA, green algae and green plants.
15) Plants get ____ J of energy from the sun.
a) 5000 J
b) 6500 J
c) 1000 J
d) 8000 J
Ans. c)
Explanation: Plants get 1000 J of energy from the sunlight itself.
16) How much energy is lost in the environment?
a) 20 %
b) 90 %
c) 100 %
d) 50 %
Ans. c)
Explanation: While progressive loss of energy 90 % is lost in the environment.
17) How much energy is available to herbivores?
a) 10 J
b) 20 J
c) 50 J
d) 15 J
Ans. a)
Explanation: The available energy to herbivores is 10 J.
18) What is the molecular formula of Ozone?
a) O
b) O2
c) O3
d) O4
Ans. c)
Explanation: Ozone is commonly denoted as O3
19) Harmful effects of ozone are
a) pneumonia
b)eyes itchiness
c) nasal cavity problems
d) all of the above
Ans. d)
Explanation: . Ozone have worst effect on human, such as it is responsible for pneumonia, eyes itchiness, nasal cavity problems and severe exposure of ozone can also lead to cancer.
20) Which are the causes of pollution?
a) Due to unlimited growth of human population.
b) Rapid industrialization
c) Uncontrolled use of vehicles
d) All of the above
Ans. d)
Explanation: The causes of pollution are due to unlimited population, industrialization and use of uncontrolled vehicles.
21) Complete the equation:
O + ___ —-> O3
a) C
b) O2
c) O4
d) none of these
Ans. b)
Explanation: When a free oxygen reacts with two oxygen atoms it forms an Ozone molecule.
22) The highest amount of energy is present in ___
a) producers
b) carnivores
c) omnivores
d) both a and b
Ans. a)
Expalantion: The highest energy present in producers that is autotrophic organisms such as plant.
23) The network of animals which is dependend on each other is known as ___.
a) food chain
b) food line
c) food web
d) none of these
Ans. c)
Explanation: Food web can be defined as network of animals which are dependent on each other.
24) The planst which are light loving plants are called ___.
a) Heliophytes
b) Sciophytes
c) mesophytes
d) xerophytes
Ans. a) Heliophytes are the plants which requires more light and they are called as light loving plants.
25) ___ maintain the biodiversity of herbivores.
a) producers
b) carnivores
c) omnivores
d) autotrophs
Ans. b)
Explanation: Carnivores feed on herbivores. They are responsible for maintaining biodiversity of herbivores.
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