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Unseen Passage for Class 10 Board

In this post, I’m giving you an “Unseen Passage for Class 10 Board” commonly asked in the CBSE Class 10th Board Exam. If you want to do well in English, make sure to practice this a bunch. It’s super important for the upcoming CBSE board exam in 2023-24. Good writing skills really matter for board exams.

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Analytical Paragraph Format Examples

Unseen Passage for Class 10

Read the passage given below.

1. An ecosystem is a community of organisms that live and interact within a particular environment. In an aquatic ecosystem, that environment is water and all the system’s plants and animals live either in or on that water. The specific setting and type of water, such as a freshwater lake or saltwater marsh, determines which animals and plants live there.

2. Marine, or ocean, systems cover about 70 per cent of the Earth’s surface and are identified by the presence of dissolved salts in the water. The level of salinity averages about 35 parts per thousand grams of water, but it can vary in response to climate or a nearby source of freshwater. Marine organisms must adapt to either a constantly changing or stable level of salt content and cannot move successfully from one to the other.

3. Saltwater ecosystems range from the abundant life of coastal areas to the nearly barren ocean bottom. In marine habitats, the food chain begins with plankton, micro-organisms that require sunlight for energy and growth, so systems closest to the surface or in relatively shallow water support more life. These include estuaries, salt marshes, coral reefs and other tropical habitats, and intertidal areas such as lagoons and kelp beds.

Unseen Passage for Class 10 Board

4. Animal life in marine ecosystems ranges from microscopic zooplankton through fish of all sizes to marine mammals, including seals, whales and manatees. Freshwater – water that is either drinkable or has little or no salt content – supports its own aquatic ecosystems. These include rivers and streams, lakes and ponds, wetlands and even groundwater. Each of these systems is unique and even within categories, any specific habitat is affected by altitude, temperature and humidity. For instance, a plant native to a warm shallow lake in the tropics could not survive on the steep banks of a cold, fast gushing mountain stream.

5. Freshwater ecosystems provide homes for a wide variety of animal life including insects, amphibians and fish. One estimate of fish species puts the number that lives in freshwater at 40 per cent of the Earth’s total. Worms, molluscs, algae and bacteria all live in freshwater systems, as do innumerable varieties of plants. In addition, animals such as birds, otters and bears use freshwater ecosystems as a food source.

Important Passage for 10 CBSE Board

On the basis of your reading of the passage given above, answer the following questions.

(1) According to the author, what, from the following, can be understood from an ecosystem?
(a) Community interactions amongst organisms is rare.
(b) A particular environment is created by one type of organism only.
(c) Organisms can live and interact to form a community.
(d) Organisms do not need communities to be dependent upon to live.

(2) Select the option that suitably completes the dialogue with reference to paragraph 3.
Jai: Saltwater marshes and estuaries do not get maximum sunlight below the surfaces of water.
Gia: Exactly! which is why they ……………………
(a) support more life closest to the surface.
(b) they are full of diverse species of animal life.
(c) are hard to invade by human beings.
(d) the food chain ends with plankton and other micro-organisms.

(3) Choose the option that best conveys the message in – ‘cannot move successfully from one to the other.’
(a) Marine organisms are adapted for both stable salt content and a changing one.
(b) Marine organisms prefer changing salt content over a stable one.
(c) Marine organisms don’t usually move either from a stable salt content to a changing one.
(d) Marine organisms prefer stable salt content over a changing one.

(4) What qualities does the Freshwater ecosystem display? Choose one option from the following:
(a) Found only at places of high altitude and humidity.
(b) Water has a high salinity content.
(c) Uniqueness and diversity within habitats.
(d) Home to an estimated 30 per cent of the Earth’s total fish.

(5) Select the option with the underlined words that can suitably replace BARREN (paragraph 3).
(a) The farmers have been facing an unproductive crop this year due to lesser rains.
(b) He described his ideal dream would be to hide in a desolate library and read novels all day.
(c) Her advances of aiming for a good college have gone unfruitful with the cancellation of exams.
(d) The politician only visited impoverished areas of his constituency before the elections.

(6) An onomatopoeia is defined as a word, which imitates the natural sounds of a thing. From the options given below, select an Onomatopoeia word that appears in the para 4.
(a) gushing
(b) ecosystems
(c) steep
(d) microscopic

Unseen Passage for Class 10

Unseen Passage for Class 10 with Answers

(7) Select the qualities from paragraph 4, that describe the Freshwater ecosystem.
(1) low salinity
(2) high salinity
(3) diverse
(4) drinkable water
(5) lagoons and kelp beds
(a) (2), (3) and (5)
(b) (1), (3) and (4)
(c) (2), (4) and (5)
(d) (1), (2) and (4)

(8) Which of the following is the importance of zooplanktons and microorganisms?
(a) Reason for increased salinity of water.
(b) Basis for distinction between ecosystems.
(c) Reason for decreased salinity of water.
(d) Primary food source for aquatic life.

(9) What does the writer specify, in paragraph 1?
(a) Freshwater ecosystem is unique and diverse.
(b) Saltwater ecosystem consists of coastal areas.
(c) Plants that can live in rivers cannot survive in saltwater.
(d) Environment for aquatic ecosystem is water.

(10) Choose the option that lists the quote best expressing the central idea of the passage.
(a) Nature is painting for us, day after day, pictures of infinite beauty.—John Ruskin
(b) What’s the use of a fine house if you haven’t got a tolerable planet to put it on. —Henry David Thoreau
(c) Eventually we’ll realize that if we destroy the ecosystem, we destroy ourselves. —John Salk
(d) The environment is where we all meet; where we all have a mutual interest; it is the one thing all of us share. —Lady Bird
Johnson

(11) What percentage of the Earth’s surface do Marine, or ocean, ecosystems cover?
(a) 70 per cent
(b) 7 per cent
(c) 50 per cent
(d) 30 per cent

(12) Which of the following animal group belongs to a freshwater ecosystem?
(a) whales, seals, manatees
(b) bears, otters, birds
(c) seals, bears, otters
(d) birds, manatees, otters

Unseen Passage for Class 10 Board with Answer & Explanation

(1) Ans. (c) Organisms can live and interact to form a community.
(2) Ans. (a) support more life closest to the surface.
(3) Ans. (a) Marine organisms don’t usually move either from a stable salt content to a changing one.
(4) Ans. (c) Uniqueness and diversity within habitats.
(5) Ans. (b) He described his ideal dream would be to hide in a desolate library and read novels all day.
(6) Ans. (a) gushing
(7) Ans. (b) (1), (3) and (4)
(8) Ans. (d) Primary food source for aquatic life.
(9) Ans. (d) Environment for aquatic ecosystem is water.
(10) Ans. (c) Eventually we’ll realize that if we destroy the ecosystem, we destroy ourselves. —John Salk
(11) Ans. (a) 70 per cent
(12) Ans. (b) bears, otters, birds