WBCHSE HS Environmental Science study materials
WBCHSE HS Environmental Science study resources

WBCHSE HS Environmental Science study plan

WBCHSE HS Environmental Science · Give each week a clear focus.

8 weeks · About 7 hours per week

Week 1

Environmental pollution and control & Environmental Science: scope, components and ecosystems

  • Classify the seven major pollutant categories (air, water, soil, noise, thermal, radioactive, solid waste) and match each to its principal WBCHSE-level control measure

  • Trace the scope of environmental science from multidisciplinary foundations to ecosystem components, writing a one-page concept map linking biotic and abiotic factors

  • Solve 15 numerical problems on pollutant concentration (ppm, mg/L, BOD/COD relationships) showing full working

  • Build a personal error log of every misclassified pollutant-control pairing from week 1 practice

Your checkpoint

A two-page pollution taxonomy table with pollutant, source, effect, control measure, and one worked numerical example per row

Week 2

Environmental pollution and control & Environmental physics, energy and climate

  • Explain the chemistry and health effects of the six criteria air pollutants and justify one control technology for each

  • Diagram the greenhouse effect and distinguish it from ozone depletion using labelled energy-flow sketches

  • Interpret BOD and COD data to judge organic load in a river case study and recommend a treatment stage

  • Calculate carbon footprint for a household scenario and compare it with a national average

Your checkpoint

A one-page climate-and-pollution briefing sheet with a labelled greenhouse diagram, BOD/COD worked example, and carbon-footprint calculation

Week 3

Environmental Science: scope, components and ecosystems & Environmental biology and ecology

  • Compare five ecosystem types (forest, grassland, aquatic, wetland, agroecosystem) by energy flow, trophic structure, and productivity

  • Draw and annotate the carbon, nitrogen, and phosphorus cycles, marking the human perturbation in each

  • Apply the ten percent law and ecological pyramid concepts to solve energy-flow problems

  • Describe succession stages from pioneer to climax community with named examples

Your checkpoint

A hand-drawn set of three nutrient-cycle diagrams with human impacts annotated and one solved energy-flow problem attached to each

Week 4

Natural resources and their conservation & Environmental biology and ecology

  • Categorise natural resources as renewable and non-renewable and justify the classification for ten contested examples

  • Explain soil erosion, waterlogging, and salinisation with their corrective measures

  • Describe the ecological and economic consequences of deforestation and groundwater over-extraction using Indian case examples

  • Apply concepts of carrying capacity and sustainable yield to a fishery or forest management scenario

Your checkpoint

A resource-conservation case-study write-up (500 words) on one Indian resource conflict, with a sustainability recommendation

Week 5

Biodiversity and wildlife conservation & Environmental chemistry and toxicology

  • Define biodiversity at genetic, species, and ecosystem levels and locate India's biodiversity hotspots on a blank outline map

  • Explain in-situ and ex-situ conservation, naming protected area categories and one example of each

  • Describe biomagnification of a named persistent pollutant through a four-level food chain with a numerical illustration

  • Outline the toxicological concepts of dose-response, LD50, and chronic versus acute exposure with examples

  • Summarise the main provisions of the Wildlife Protection Act and Biological Diversity Act in note form

Your checkpoint

A labelled map of India's biodiversity hotspots plus a biomagnification calculation sheet with dose-response definitions

Week 6

Environmental chemistry and toxicology & Environmental physics, energy and climate

  • Explain photochemical smog formation and acid rain chemistry step by step with equations

  • Compare conventional and non-conventional energy sources by efficiency, cost, and environmental impact

  • Describe radioactive pollution sources and safe disposal principles

  • Solve numerical problems on noise intensity in decibels and on energy conversion efficiency

Your checkpoint

A formula-and-equation revision card set covering smog, acid rain, decibel calculations, and energy efficiency

Week 7

Environmental management, law and sustainable development & Field work, practical skills and project work

  • Outline the key Indian environmental legislation and the constitutional provisions supporting environmental protection

  • Explain Environmental Impact Assessment stages and the precautionary and polluter-pays principles

  • Design a field-survey protocol for measuring water quality or noise levels, specifying instruments, sampling frequency, and safety steps

  • Draft the structure of a project report: aim, methodology, observations, analysis, conclusion

  • Relate the Sustainable Development Goals to at least three Indian environmental programmes

Your checkpoint

A complete project report skeleton with a field protocol, data-recording table, and legal-framework summary

Week 8

Environmental Science: scope, components and ecosystems & Natural resources and their conservation & Biodiversity and wildlife conservation & Environmental pollution and control & Environmental chemistry and toxicology & Environmental biology and ecology & Environmental physics, energy and climate & Environmental management, law and sustainable development & Field work, practical skills and project work

  • Sit two full-length mock papers under timed conditions and score them against the marking scheme

  • Rework every error from the mocks into corrected notes within 24 hours

  • Recite from memory the definitions, formulae, and legislation names most often asked across all domains

  • Complete and self-evaluate the field-work deliverable against the practical marking criteria

Your checkpoint

Two scored mock papers with a corrected error log and a final one-page formula-and-facts sheet

Milestones

Week 2: Can list all seven pollutant categories with a control measure each and correctly solve 12 of 15 concentration numericals unaided

Week 4: Can draw the carbon and nitrogen cycles from memory and explain three Indian resource-conservation cases without notes

Week 6: Scores at least 60 percent on a self-made 40-question test covering domains 3, 4, 5, and 7

Week 8: Scores at least 65 percent on both timed mock papers and has a zero-gap corrected error log across all nine domains