CISCE ISC Class 12 Environmental Science Syllabus 2026-27

CISCE ISC Class 12 Environmental Science 2027 Syllabus

Facts checked: against the official notice at cisce.org on 13 November 2026.

Quick Summary

Council for the Indian School Certificate Examinations (CISCE) has prescribed the ISC Class 12 Environmental Science syllabus (Subject Code 877) for Academic Session 2026-27 and Board Examination Year 2027, with Paper I theory of 70 marks in 3 hours across seven units in three sections and Paper II project work of 30 marks. It is meant only for ISC Class 12 students who have opted for Environmental Science for the 2027 board examination.

CISCE ISC Class 12 Environmental Science 2027: Short Details

This entry covers only the CISCE-prescribed syllabus for ISC Class 12 Environmental Science for the 2026-27 session leading to the 2027 board examination.

The overview table placed with this section summarises the session, exam year, subject identity and the two-paper structure. Indian students in CISCE-affiliated schools who have Environmental Science entered as Subject Code 877 are the intended readers. Students in other classes, other boards, or ISC students who have not opted for this elective are not covered by this syllabus.

What to verify first

• Confirm the school subject list shows Environmental Science with code 877, not Environmental Education or another elective with a similar name.
• Use the full name Council for the Indian School Certificate Examinations (CISCE) and then CISCE when checking circulars, to avoid mixing ISC and ICSE documents.

CISCE ISC Class 12 Environmental Science 2027 Exam Pattern

Paper I spreads its units across three sections for the written examination, while Paper II is school-assessed practical and project work.

The grouping matters more than the count. Section A builds concepts of environment, ecology and population; Section B deals with living systems, biodiversity and pollution; Section C deals with resources, development and management. Questions are set section-wise, so answers must be practised in the section where the unit is placed in the official notification.

Reading the pattern correctly

• Keep Paper I preparation strictly section-linked. Writing a Unit 5 pollution answer with Section C management headings breaks the expected structure.
• Treat Paper II as a separate school-based component with field observation and file work, not as an extra theory chapter.

Several third-party summaries merge or reorder units. Where they differ, the sequence in the official notification prevails.

CISCE ISC Class 12 Environmental Science 2027 Subject-wise Syllabus

The official PDF titles seven units and groups them under three sections for Paper I, as sequenced on the contents page and unit headers (pages 2-9 of the PDF).

The titles below follow that official order. Use them to label notes and to correct summaries that place pollution before ecology or list legislation as the opening unit.

Section A - Understanding Environment, Ecology and Population

• Unit 1: Man and Environment - relationship between humans and environment, historical change in demands on natural systems.
• Unit 2: Ecological Principles and Ecosystems - levels of organisation, ecosystem structure and function, energy flow and material cycles.
• Unit 3: Population Ecology and Natural Resource Pressures - population characteristics, growth patterns and pressure on land, water and forests.

Section B - Biodiversity, Pollution and Monitoring

• Unit 4: Biodiversity and Conservation - levels and values of biodiversity, threats and in-situ and ex-situ conservation approaches.
• Unit 5: Pollution, Its Causes, Effects and Control - air, water, soil and noise pollution, sources, impacts and monitoring and control measures.

Section C - Resources, Development and Management

• Unit 6: Natural Resources, Utilisation and Conservation - renewable and non-renewable resources, use patterns and conservation practices.
• Unit 7: Sustainable Development, Environmental Management and Legislation - sustainable development concepts, environmental planning, key laws and role of national and international bodies.

Students consulting the CISCE syllabus document will find the same section headings above each group of units; that placement decides how to organise revision files.

CISCE ISC Class 12 Environmental Science 2027 Marking Scheme and Duration

The total is divided between an external written paper and internal school-based assessment, as shown in the marking table with this section.

The distinction to watch is the mode, not just the weight. Paper I is answered in the examination hall within the time limit noted in the intro, while Paper II is built through the year at school through field visits, data recording and project-file presentation. A student who prepares only theory will still have an incomplete requirement without the school component.

Schools enter the subject code and assess the project component as per the official notification. Private study material that assigns its own chapter-wise marks should not be used to prioritise units.

CISCE ISC Class 12 Environmental Science 2027 Important Links

The only authoritative source for this syllabus is the CISCE PDF for Subject Code 877.

The links table with this section leads to that file. No other portal form, upload limit or separate application is part of this syllabus as far as the official notification states; school-level project submission follows school instructions.

How to download and verify

1. Open the official website link for the syllabus PDF.
2. Open or save the file titled ISC Environmental Science and check the cover shows Subject Code 877.
3. Confirm the header refers to Academic Session 2026-27 and Board Examination Year 2027.
4. Compare the contents page sequence of three sections and seven units with the list in the Subject-wise Syllabus section above.
5. Save the file with a clear name such as ISC-Env-Sci-877-2027 and use it when matching school notes.

For citation in notes, download notification refers to the same official file.

Frequently Asked Questions

Which class, subject code and session does the ISC Environmental Science syllabus 2026-27 apply to?

It applies to ISC Class 12 Environmental Science Subject Code 877 for Academic Session 2026-27 leading to the Board Examination Year 2027.

What is the marks distribution and duration for ISC Class 12 Environmental Science?

The subject carries 100 marks in total, with Theory Paper I for 70 marks of 3 hours duration and Practical/Project Work Paper II for 30 marks.

How is the theory syllabus structured into sections and units?

Theory Paper I covers seven units grouped into three sections. Refer to the official notification at https://cisce.org/wp-content/uploads/2025/04/31.-ISC-Environmental-Science-1.pdf for the section and unit names and scope.

What project work options are given for Paper II?

Paper II offers five project options with prescribed work involving a six-month study and a one-month study as detailed in the syllabus. Refer to the official notification at https://cisce.org/wp-content/uploads/2025/04/31.-ISC-Environmental-Science-1.pdf for the option titles and requirements.

How is the Paper II practical and project work evaluated?

There is no separate written paper for Paper II and the project work is assessed by a visiting examiner. Refer to the official notification at https://cisce.org/wp-content/uploads/2025/04/31.-ISC-Environmental-Science-1.pdf for the evaluation guidelines.

Where can I download the official ISC Class 12 Environmental Science syllabus for 2026-27?

Download it from the official CISCE PDF at https://cisce.org/wp-content/uploads/2025/04/31.-ISC-Environmental-Science-1.pdf and verify Subject Code 877 with the 70-mark theory and 30-mark project structure.