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Science
Class 8

CBSE · Class 8 · Science

How Nature Works in Harmony

Chapter 12CuriosityNCERT · Classes I–VIII · current textbook editions

2 worlds · 3 labs · 1 story for this chapter.

Topics

Ecosystems
- Living and non-living components
- Interactions among organisms
- Food chains and feeding networks
- Decomposers and nutrient cycling
Change and benefits
- Effects of changing one component
- Human-made ecosystems
- Ecosystem services
- Farms and healthy ecosystems

Learning objectives

Trace how a change in one ecosystem component can affect other components.

Worlds

Places to explore freely · 2 worlds

WorldEcosystems & Food WebsA dry forest of eight species as a web that is also equations: draw who eats whom, pull the leopard and watch the deer and then the grass, run a drought, find the keystone, loose lantana and control it, measure a carrying capacity, follow a toxin up the chain, read the monsoon pulse, and rebuild a collapsed web
WorldAgriculture & CropsRun a hectare a day at a time with only a three-day forecast: sow on the rain, bank the water, split the nitrogen before the rains leach it, weed in the critical weeks, count pests and their enemies before you spray, cut before the shower, keep the soil over three seasons, live ten monsoons at once, and make a season pay — every loss measured by replaying your own season without it

Main labs

Built for this chapter · 2 labs

Main labCrop Production & ManagementBiology
Main labForests: Our LifelineBiology

More labs

Also fit this chapter · 1 lab

LabEcosystem DynamicsFood webs, populations

Stories

Read it as a story · 1 story

StorySeeds PlantsBiology

Practice

Questions for Class 8 Science, with worked answers, on screen or as a printed paper.

Open the question bank

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