Skip to main content
Super TutorResources
Chapter 10 of 19
Revision Notes

Nutrition — Revision Notes

ICSE · Class 9 · Biology

Nutrition revision notes for ICSE Class 9 Biology: 4 topics in quick points. Key terms: Nutrition is the supply, Carbohydrates are compounds and Glucose.

42 questions40 flashcards4 formulas & key relations5 concepts

Interactive on Super Tutor

Studying Nutrition? Get the full interactive chapter.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for revision notes and more.

Try Super Tutor — Free

Free trial, no card needed.

An infographic illustrating the six main purposes of nutrition for living organisms: growth, repair, energy, maintenance of chemical composition, provision of raw materials for secretions, and protect
Super Tutor

One of 10 illustrations for Nutrition in Super Tutor — alongside flashcards, concept maps and practice questions.

Key Topics to Revise

1

1. Basic ideas: nutrition, food, and diet

  • Nutrition is the supply of essential chemical compounds to the body.
  • Food is any substance eaten or drunk that contains nutrients.
  • Diet is the combination of food items eaten in meals.
2

2. Classes of nutrients

  • The six classes of food substances are carbohydrates, fats, proteins, mineral salts, vitamins, and water.
  • Carbohydrates and fats mainly provide energy.
  • Proteins are needed for growth and repair.
3

3. Carbohydrates: sugars, starch, cellulose, and glycogen

  • Carbohydrates are compounds of carbon, hydrogen, and oxygen with hydrogen and oxygen in the ratio 2:1.
  • Monosaccharides are simple sugars and have the general formula C6H12O6.
  • Glucose is the simplest and most common sugar and is called grape-sugar.
4

4. Fats, proteins, and energy value

  • Fats contain carbon, hydrogen, and oxygen, but with much less oxygen than carbohydrates.
  • One mole of fat releases 9.45 Kcal of energy, which is more than carbohydrates.
  • Fats store energy and also act as a solvent for fat-soluble vitamins.

Get complete notes with diagrams and examples

Full Notes

Key Concepts

Nutrition is the supply of essentialCarbohydrates are compounds of carbonGlucoseStarch is an insoluble polysaccharideCellulose is not digested in

Frequently Asked Questions

What are the important topics in Nutrition for ICSE Class 9 Biology?
Key topics in Nutrition include Basic ideas: nutrition, food, and diet, Classes of nutrients, Carbohydrates: sugars, starch, cellulose, and glycogen, Fats, proteins, and energy value. Study these first, then practise questions on each for Class 9 exams.
How should I revise Nutrition for Class 9 exams?
Learn the core ideas first, then work through the 42 practice questions on Nutrition. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Nutrition

All ICSE Class 9 Biology Revision Notes

For serious students

Get the full Nutrition chapter — start free.

Quizzes, flashcards, an AI doubt solver and a study plan for ICSE Class 9 Biology. Free to start, no card needed.

Try Super Tutor Free
Try this chapter free