CBSE Class 9 Science — Earth as a System: Energy, Matter, and Life
Chapter 13 of the CBSE Class 9 Science syllabus. About 68 minutes of teaching.
Unit: Earth as a System
Unit weightage: 5 marks
5 topics
What is in this chapter
- 1Earth as an Interconnected System foundation12 min
- 2Nature of Solar Energy14 min
- 3Differential Heating of the Earth and Winds14 min
- 4Biogeochemical Cycles16 min
- 5Human Impact on Earth's System12 min
What to know first
No other chapter in this subject is listed as a prerequisite for this one, so you can pick it up without finishing the ones before it.
Where the marks are
CBSE publishes marks by unit, not by chapter. The Earth as a System unit carries 5 of the 80 marks in the paper, across 1 chapters. Our estimate for this chapter alone is about 5 marks — useful for deciding what to study first, but it is our split of the unit, not an official CBSE per-chapter figure.
This chapter is not on the board yet.
We author chapters one at a time and only publish once the lesson has been checked end to end, so we would rather say "not yet" than ship a thin one. The syllabus above is accurate and free to use meanwhile.
Other chapters in Class 9 Science
Cell: The Building Block of LifeTissues in ActionDescribing Motion Around UsExploring Mixtures and their SeparationHow Forces Affect MotionWork, Energy, and Simple MachinesJourney Inside the AtomAtomic Foundations of MatterSound Waves: Characteristics and ApplicationsReproduction: How Life ContinuesPatterns in Life: Diversity and Classification