📐 Mathematics Revision
Chapter 1: Number Systems
Main Topics: Rational Numbers, Irrational Numbers, Real Numbers, Decimal Expansion.
- Rational Number = p/q form
- Irrational Number = Non terminating & non repeating
- Real Number = Rational + Irrational
🎯 Trick: “RIR” → Rational + Irrational = Real
🧠 Mnemonic: “Pi Root Never Ends” → π, √2, √3 are irrational.
Chapter 2: Polynomials
- Polynomial degree depends on highest power.
- Linear → degree 1
- Quadratic → degree 2
- Cubic → degree 3
🎯 Trick: “Li-Qua-Cu” → Linear, Quadratic, Cubic.
🧠 Mnemonic: “Highest Power is the Boss.”
Chapter 3: Coordinate Geometry
- X-axis horizontal
- Y-axis vertical
- Origin = (0,0)
🎯 Trick: “X Sleeps, Y Stands” → X horizontal, Y vertical.
Chapter 4: Linear Equations in Two Variables
- Equation form → ax + by + c = 0
- Graph forms straight line
🧠 Mnemonic: “Linear Means Line.”
Chapter 5: Euclid’s Geometry
- Point has no dimension.
- Line has length only.
- Plane has length & breadth.
🎯 Trick: “PLP” → Point, Line, Plane.
Chapter 6: Lines and Angles
- Vertically opposite angles are equal.
- Linear pair = 180°
- Angles around point = 360°
🧠 Mnemonic: “Straight line gives 180.”
Chapter 7: Triangles
- Sum of angles = 180°
- Exterior angle = sum of opposite interior angles
🎯 Trick: “Triangle = 180 Rule.”
Chapter 8: Quadrilaterals
- Sum of angles = 360°
- Parallelogram opposite sides equal
🧠 Mnemonic: “Quad = Four sides + 360.”
🧪 Science Revision
Physics: Motion
- Speed = Distance / Time
- Velocity = Displacement / Time
- Acceleration = Change in velocity / Time
🎯 Trick: “SDT” → Speed = Distance ÷ Time
🧠 Mnemonic: “VAT” → Velocity, Acceleration, Time relation.
Force and Laws of Motion
- Newton 1st Law → Law of Inertia
- Newton 2nd Law → F = ma
- Newton 3rd Law → Every action has equal opposite reaction.
🎯 Trick: “I-F-A” → Inertia, Force, Action-reaction.
Gravitation
- g = 9.8 m/s²
- Weight = mass × gravity
🧠 Mnemonic: “Weight goes down because gravity pulls.”
Chemistry: Matter in Our Surroundings
- Solid → fixed shape
- Liquid → fixed volume
- Gas → no fixed shape
🎯 Trick: “SLG” → Solid, Liquid, Gas.
Atoms and Molecules
- Atom = smallest particle
- Molecule = group of atoms
- Avogadro Number = 6.022 × 10²³
🧠 Mnemonic: “Molecule = Many Atoms Together.”
Biology: Cell
- Cell discovered by Robert Hooke.
- Nucleus controls activities.
- Mitochondria = powerhouse.
🎯 Trick: “NMP” → Nucleus, Mitochondria, Powerhouse.
Tissues
- Plant tissues → Meristematic & Permanent
- Animal tissues → Epithelial, Connective, Muscular, Nervous
🧠 Mnemonic: “ECMN” → Epithelial, Connective, Muscular, Nervous.