Worksheets › Class 8 › How Nature Works in Harmony
Class 8 How Nature Works in Harmony worksheet
CBSE Science. Ecosystems, producers, consumers and decomposers, food chains and webs, quadrats, relationships. Every sheet has 20 questions in three sections and an answer key, and the numbers change every time.
Sample questions
Real questions from this chapter, as the app sets them. Tap Answer to see the answer and working.
Section A · multiple choice
- 1.
The living parts of an ecosystem are called:
- minerals
- climate
- abiotic components
- biotic components
Answer
(d) biotic components
- 2.
In a food chain, a deer is a:
- decomposer
- omnivore
- herbivore
- carnivore
Answer
(c) herbivore
- 3.
What kind of relationship is this: a louse on a person's head?
- decomposition
- commensalism
- mutualism
- parasitism
Answer
(d) parasitism
Section B · short answer
- 4.
What is an ecosystem?
Answer
All the living things in an area together with the non-living things around them.
- 5.
Is each a producer, herbivore, carnivore, omnivore or decomposer? (a) a leopard (b) a crow
Answer
(a) carnivore (b) omnivore
Section C · long answer
- 6.
Explain how removing frogs from a food chain affects other organisms.
Answer
In grass → grasshopper → frog → snake, removing frogs means grasshoppers increase and eat more grass, while snakes have less food and decrease. This happened in India when frogs were over-caught in the 1980s and insect pests rose.
Fresh sheets for your child
In the app, every How Nature Works in Harmony sheet is new: the app remembers the questions your child has already had and leaves them out. Print the sheet as a PDF, or use notebook mode and write the answers in a notebook.
Coming soon for Android and iPhone.