Class 7 NCERT Revision Series

📐 Mathematics Revision

Integers

Positive numbers are greater than zero.
Negative numbers are less than zero.
Addition of integers follows sign rules.

🎯 Trick: “Same Sign Add, Different Sign Subtract.”

🧠 Mnemonic: “Positive up, Negative down.”

Fractions and Decimals

Fractions can be converted into decimals.
Proper fraction value is less than 1.

🎯 Trick: “Divide numerator by denominator.”

Data Handling

Mean = Sum of observations ÷ Total observations.
Mode = Most repeated number.

🧠 Mnemonic: “MMM” → Mean, Median, Mode.

Simple Equations

Variable is represented by letters.
Transpose changes sign.

🎯 Trick: “Move across = sign change.”

Lines and Angles

Complementary angles = 90°
Supplementary angles = 180°

🧠 Mnemonic: “C90, S180.”

Triangle and Its Properties

Sum of angles of triangle = 180°
Exterior angle property important.

🎯 Trick: “Triangle always 180.”

Perimeter and Area

Perimeter = boundary length.
Area = covered surface.

🧠 Mnemonic: “Perimeter walks, Area fills.”

🧪 Science Revision

Nutrition in Plants

Green plants make food by photosynthesis.
Chlorophyll traps sunlight.

🎯 Trick: “Sun + Water + CO₂ = Food.”

Nutrition in Animals

Human digestive system includes mouth, stomach and intestine.
Ruminants chew cud.

🧠 Mnemonic: “MSI” → Mouth, Stomach, Intestine.

Heat

Clinical thermometer measures body temperature.
Heat flows from hot to cold.

🎯 Trick: “Heat always moves hot → cold.”

Acids, Bases and Salts

Acids taste sour.
Bases taste bitter.
Litmus indicates acid/base.

🧠 Mnemonic: “Sour Acid, Bitter Base.”

Respiration in Organisms

Respiration releases energy.
Oxygen is important in breathing.

🎯 Trick: “Breathing gives energy.”

Electric Current and Its Effects

Electric current produces heat.
Fuse protects appliances.

🧠 Mnemonic: “Fuse saves devices.”

🌍 Social Science Revision

History: Tracing Changes Through a Thousand Years

Historians use manuscripts and inscriptions.
New technologies changed society.

🎯 Trick: “History changes with time.”

The Delhi Sultans

Delhi became important political center.
Slave dynasty important topic.

🧠 Mnemonic: “Delhi = Sultan Power.”

Geography: Environment

Environment includes natural and human surroundings.
Ecosystem is interaction of living things.

🎯 Trick: “Everything around us = Environment.”

Inside Our Earth

Earth has crust, mantle and core.
Core is hottest layer.

🧠 Mnemonic: “CMC” → Crust, Mantle, Core.

Civics: Equality

All citizens are equal before law.
Equality is important in democracy.

🎯 Trick: “Same law for all.”

📖 English Revision

Honeycomb Important Chapters

Three Questions
A Gift of Chappals
Gopal and the Hilsa Fish
The Ashes That Made Trees Bloom

🧠 Mnemonic: “TGGT” → Three Questions, Gift, Gopal, Trees Bloom.

Grammar Revision

Nouns
Pronouns
Tenses
Active and Passive Voice

🎯 Trick: “NPTV” → Noun, Pronoun, Tense, Voice.

📚 Hindi Revision

वसंत भाग

हम पंछी उन्मुक्त गगन के
दादी माँ
हिमालय की बेटियाँ

🧠 Mnemonic: “पदहि” → पंछी, दादी, हिमालय।

Hindi Grammar

संधि
समास
विलोम शब्द
मुहावरे

🎯 Trick: “SSVM” → संधि, समास, विलोम, मुहावरे।