Class 10 Science Important Diagrams for CBSE Boards (Chapter-wise)

Diagrams carry marks for both the drawing and the labels. Here are the standard NCERT diagrams worth practising. Check them against your current syllabus, as some topics were removed in recent years.

Physics

• Ray diagrams for concave and convex mirrors (all object positions)
• Ray diagrams for convex and concave lenses
• Refraction through a rectangular glass slab (showing lateral displacement)
• Dispersion of white light by a glass prism
• The human eye, and correction of myopia and hypermetropia
• Circuit diagrams: resistors in series and parallel, with ammeter and voltmeter
• Magnetic field lines around a bar magnet, a straight conductor and a solenoid

Chemistry

• Electrolysis of water
• Reaction of zinc with dilute acid, with the hydrogen test
• Structures of simple carbon compounds (electron-dot and structural formulas)

Biology

• Human digestive system (alimentary canal)
• Human respiratory system
• Human heart (sectional view) and the double circulation scheme
• Excretory system and the structure of a nephron
• Stomata (open and closed)
• Neuron, reflex arc, human brain
• Longitudinal section of a flower; germination of pollen on the stigma
• Male and female human reproductive systems

How to score full marks

1. Draw in pencil, with clean lines.
2. Label with straight lines, never crossing each other, and write the labels horizontally.
3. Use arrows correctly on rays and circuits.
4. Practise each diagram 3–4 times so it takes under 3 minutes.