Exercise Solutions Available
Step-by-step answers for all textbook questions in this chapter
How to Use This Solutions Map
For each chapter:
- Priority 1 — Questions that appear directly in exams (do these first)
- Priority 2 — Understanding questions (do these after Priority 1)
- Priority 3 — Activity/observation questions (do these for deeper learning)
Physics Chapters
Measurements
| Exercise type | Priority | Notes |
|---|---|---|
| Intext: Conversion problems | 1 | Numbers in SI units are direct exam questions |
| Exercise: Define terms | 1 | CGS, SI, MKS — all definitions tested |
| Activity: Error calculation | 2 | Do once; understand the concept |
| Think and Answer: Why SI is universal | 2 | 3-mark exam question type |
Force and Pressure
| Exercise type | Priority | Notes |
|---|---|---|
| Define: Force, Pressure, Pascal's Law | 1 | One-mark questions |
| Numerical: P = F/A calculations | 1 | Calculation questions — do all 5+ examples |
| Application questions: Hydraulic press | 1 | How/Why 3-mark questions |
| Diagram: Draw and label hydraulic jack | 2 | Diagram questions worth 3 marks |
Heat
| Exercise type | Priority | Notes |
|---|---|---|
| Define: Conduction, convection, radiation | 1 | Distinguish-type 3-mark questions |
| Numerical: Specific heat calculations | 1 | Q = mcΔT problems — practise all |
| Application: Why metals feel cold | 2 | Reasoning questions |
Light
| Exercise type | Priority | Notes |
|---|---|---|
| Laws of reflection/refraction | 1 | State + explain — 3 marks |
| Diagram: Ray diagrams (concave/convex mirrors) | 1 | 3-mark diagram questions |
| Mirror formula: 1/v + 1/u = 1/f | 1 | Numerical problems |
| Applications: Uses of mirrors and lenses | 2 | Short answer |
Electricity
| Exercise type | Priority | Notes |
|---|---|---|
| Ohm's Law numerical: V = IR | 1 | Calculation questions every exam |
| Series/Parallel resistance formulae | 1 | Do 10 numerical problems |
| Circuit diagrams: Draw and label | 1 | Diagram in 3-mark section |
| Heating effect: H = I²Rt problems | 2 | Less frequent but important |
Chemistry Chapters
Matter Around Us
| Exercise type | Priority | Notes |
|---|---|---|
| States of matter — properties | 1 | Compare table: 3 marks |
| Changes of state terminology | 1 | Sublimation, evaporation — definitions |
| Activity: Heating and cooling curve | 2 | Concept understanding |
Atomic Structure
| Exercise type | Priority | Notes |
|---|---|---|
| Parts of atom: proton, neutron, electron | 1 | 1-mark questions |
| Electron configuration (shells K, L, M) | 1 | Draw for Na, Mg, Cl |
| Atomic number vs mass number | 1 | Direct calculation |
| Isotopes and isobars — definition + example | 1 | 3-mark questions |
Periodic Classification
| Exercise type | Priority | Notes |
|---|---|---|
| Groups and periods — definition | 1 | One-mark questions |
| Properties of alkali metals / halogens | 1 | Short answer |
| Mendeleev vs Modern periodic table | 2 | Compare/contrast 3-mark |
Acids, Bases and Salts
| Exercise type | Priority | Notes |
|---|---|---|
| Properties of acids and bases | 1 | Compare table |
| pH scale: acid < 7, base > 7, neutral = 7 | 1 | One-mark questions |
| Neutralisation reaction examples | 1 | Write equation + explain |
| Uses of acids, bases, salts | 2 | Short answer |
Carbon and Its Compounds
| Exercise type | Priority | Notes |
|---|---|---|
| Allotropes of carbon | 1 | Diamond, graphite — properties |
| Organic compounds — definition + examples | 1 | One-mark questions |
| Hydrocarbons: alkanes, alkenes, alkynes | 2 | Naming convention |
Biology Chapters
Life Processes of Plants
| Exercise type | Priority | Notes |
|---|---|---|
| Photosynthesis equation | 1 | Write balanced equation |
| Factors affecting photosynthesis | 1 | Three factors — 3 marks |
| Transpiration: definition + role | 1 | Short answer |
| Diagram: Stomata, leaf section | 2 | 3-mark diagram |
Life Processes of Animals
| Exercise type | Priority | Notes |
|---|---|---|
| Digestion: mouth → stomach → intestine | 1 | Flow chart question |
| Respiratory organs in different animals | 1 | Tabular answer |
| Blood composition: RBC, WBC, plasma | 1 | Short answer |
| Excretory organs and products | 1 | 3-mark answer |
Microorganisms
| Exercise type | Priority | Notes |
|---|---|---|
| Types of microorganisms with examples | 1 | Table: bacteria, virus, fungi, protozoa |
| Useful microorganisms (antibiotics, yeast) | 1 | Short answer |
| Diseases caused by microorganisms | 1 | 5-mark answer |
Reproduction
| Exercise type | Priority | Notes |
|---|---|---|
| Asexual vs sexual reproduction | 1 | Distinguish — 3 marks |
| Types of asexual: fission, budding, spores | 1 | Define + example |
| Pollination: self vs cross | 1 | 3-mark question |
| Human reproductive system: diagram + label | 2 | 5-mark diagram |
Health and Hygiene
| Exercise type | Priority | Notes |
|---|---|---|
| Communicable vs non-communicable diseases | 1 | Compare — 3 marks |
| Balanced diet: nutrients and sources | 1 | 5-mark answer |
| Vaccination importance | 1 | Short answer |
Answer Format Guide for Science
| Marks | Format |
|---|---|
| 1 mark | One sentence definition or term |
| 2 marks | Definition + one example or property |
| 3 marks | Three sentences, each a separate point; OR definition + explanation + application |
| 5 marks | Definition (1) + explanation (2) + diagram/formula (1) + application (1) |
Frequently Asked Questions
Yes — attempt all exercises. One-mark and two-mark questions from textbook exercises appear almost verbatim in exams. The 'Intext questions' and 'Exercises' at chapter end are the highest priority.