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ICSE Class 8 Ecosystem — practice questions

Explore 21 free Ecosystem questions in ICSE Class 8 Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Ecosystem questions and exercises with answers

Showing questions 1–21 of 21.

What makes a forest an ecosystem?Read the answer and worked solution →Which forest group consists of biotic components?Read the answer and worked solution →Which pair contains climatic abiotic factors in a forest?Read the answer and worked solution →Why are green forest plants called producers?Read the answer and worked solution →A deer eats leaves in a forest. What is its ecological role?Read the answer and worked solution →Which organisms commonly decompose dead forest material?Read the answer and worked solution →How does decomposition help growing forest plants?Read the answer and worked solution →What links successive organisms in a food chain?Read the answer and worked solution →What is a food web in a forest?Read the answer and worked solution →What is the main initial energy source for a green forest's food chains?Read the answer and worked solution →How do energy and nutrients move through a forest ecosystem?Read the answer and worked solution →At a forest edge, a frog eats plant-eating insects. The frog is a:Read the answer and worked solution →A forest bear eats both fruits and animals. Which feeding category fits it?Read the answer and worked solution →A tiger hunts, kills and eats a deer. What relationship does this show?Read the answer and worked solution →Mistletoe obtains nourishment from a living forest tree and harms it. The tree is the:Read the answer and worked solution →Gut organisms help a termite digest wood and receive food and shelter. Both benefit. This is:Read the answer and worked solution →What distinguishes a parasite from a predator in a forest?Read the answer and worked solution →A forest has mosses near the ground, shrubs above and tall trees overhead. What does this show?Read the answer and worked solution →What does a pyramid of numbers represent?Read the answer and worked solution →Which pairing correctly identifies forest flora and fauna?Read the answer and worked solution →Which vegetation chiefly characterises a forest ecosystem?Read the answer and worked solution →

Worked practice questions

What makes a forest an ecosystem?

  1. Its tree species considered alone
  2. Its rainfall records considered alone
  3. Its interacting life and surroundings
  4. Its animals considered separately
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Correct answer: C. Its interacting life and surroundings

An ecosystem includes interactions between living organisms and their non-living surroundings.

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Which forest group consists of biotic components?

  1. Deer, fungi and trees
  2. Rain, trees and sunlight
  3. Soil, fungi and humidity
  4. Wind, deer and rain
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Correct answer: A. Deer, fungi and trees

Deer, fungi and trees are living organisms, so they are biotic components.

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Which pair contains climatic abiotic factors in a forest?

  1. Insects and wind
  2. Humidity and sunlight
  3. Bacteria and rainfall
  4. Fungi and temperature
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Correct answer: B. Humidity and sunlight

Humidity and sunlight are non-living physical factors affecting forest organisms.

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