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Class 10  »  Biology  »  Our Environment

Food Chain and Food Web_Unsolved Paper

Class 10

Chapter: Our Environment | Topic: Food Chain and Food Web

Unsolved Paper
Study Material.
Class 10

FOOD CHAIN AND FOOD WEB_UNSOLVED PAPER

Topic: Food Chain and Food Web

Time: 90 mins | Marks: 45 | Difficulty: Medium
multiple choice question

Q1. In a food chain, which organism usually forms the first trophic level?

  1. Herbivore
  2. Producer
  3. Carnivore
  4. Decomposer

Q2. Consider the food chain:

Grass --> Grasshopper --> Frog --> Snake --> Eagle

Which organism directly eats the grasshopper?

  1. Snake 
  2. Eagle
  3. Grass
  4. Frog

Q3.What does the arrow in a food chain mainly represent?

  1. Movement of animals
  2. Direction of energy transfer
  3. Movement of water
  4. Growth of organisms

Q4.Which of the following is most likely to form a food web?

  1. Grass --> Deer --> Tiger
  2. Algae --> Fish --> Bird
  3. Grass --> Rabbit --> Fox, along with other interconnected feeding relationships
  4. Wheat --> Human

Q5. In the food chain Plants --> Insects --> Birds --> Hawks, the insects occupy which trophic level?

  1. First
  2. Second
  3. Third
  4. Fourth

Q6.A farmer notices that crops, insects, frogs, snakes and birds are all present in a field. Several organisms feed on more than one type of organism. This situation is best represented by:

  1. A single food chain
  2. A food web
  3. A water cycle
  4. A pyramid of numbers

Short questions

Q1. What is a food chain? Write one suitable example involving three or four organisms.

Q2. Why are producers important in a food chain? Explain in simple terms how they support other organisms.

Q3. Differentiate between a food chain and a food web on the basis of their feeding relationships.

Q4. In a school garden, butterflies feed on flowers while some birds feed on insects. How can such relationships become part of a food web? Explain briefly.

Q5. Consider the following food chain:

Wheat plant --> Rat --> Snake --> Hawk

If one organism in this chain becomes very rare, how might this affect the feeding relationships of the other organisms? Give a reasoned response.

Q6. A pond near an Indian village contains algae, small insects, fish, frogs, snakes and birds. Why might several different food chains exist in the same pond ecosystem?

long questions

Q1. Explain the movement of energy through different trophic levels in a food chain. Use a suitable food chain to describe the sequence from a producer to higher-level consumers.

Q2. What is a food web? Explain how several interconnected food chains can form a food web. Why can a food web provide more than one feeding pathway for organisms in an ecosystem?

Q3. Study the following organisms found in a grassland ecosystem:

Grass, grasshopper, rabbit, mouse, frog, snake, fox, eagle

Construct two different possible food chains using these organisms and then explain how such chains could become interconnected to form a food web.

appication-based questions

Q1. A grassland has the following feeding relationships:

  • Grass is eaten by rabbits and grasshoppers.

  • Grasshoppers are eaten by frogs and birds.

  • Rabbits are eaten by foxes and eagles.

  • Frogs and birds are eaten by snakes.

  • Snakes are eaten by eagles.

Based on these relationships:

(a) How many different direct feeding relationships are listed above?
(b) Identify any two different food chains that can be formed from the given relationships.

Q2. A student observes the following organisms around a crop field:

Crop plants, caterpillars, rats, frogs, snakes, owls and hawks

The student records these feeding relationships:

Organism

Feeds on

Caterpillar

Crop plants

Rat

Crop plants

Frog

Caterpillar

Snake

Rat and Frog

Owl

Rat and Snake

Hawk

Snake

Using the table, write two possible food chains and identify the organism that participates in both chains.

 

Q3. A pond ecosystem contains the following organisms:

Algae --> small fish --> large fish --> water bird

Another feeding pathway is:

Algae --> aquatic insects --> frog --> water snake --> water bird

A student wants to represent both pathways together instead of drawing them separately.

(a) How many different trophic levels are present in the first pathway?
(b) What type of ecological diagram would be more suitable for showing both interconnected pathways together?

Total: 45 Marks | Time: 90 mins

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