Science in SSC/RRB (Physics, Chemistry, Biology) is 6-10 marks but decides tie-breaks. The syllabus says “General Science”, but papers ask only 10th-level facts, not derivations. Students who read full NCERTs score the same as those who do 30 targeted pages — if the 30 pages are right.
What actually gets asked
Last 5 years’ SSC papers show: Physics: units, laws (Newton, Ohm), sound/light basics; Chemistry: pH, acids-bases, periodic table (groups 1, 17), alloys; Biology: human body systems, vitamins, diseases, plant parts. No numericals beyond “pH of blood is 7.4”.
30-day split
- Days 1-10 Biology: Cell, tissue, digestive/respiratory/circulatory, vitamins & deficiency chart (one page), diseases (viral vs bacterial). Make one deficiency table and you’re done.
- Days 11-20 Physics: Units & measurements, motion, light (mirror/lens formulas as words, not algebra), sound. One page per law with one daily-life example.
- Days 21-30 Chemistry: Matter, acids/bases/salts, periodic trends, alloys & uses, environmental chemistry (pH, greenhouse). One alloy table (Brass → Cu+Zn) covers 2 marks/year.
Don’t buy 3 books. One Lucent Science section + the 3 tables above + PYQs is the entire Science for one-day exams.
The three tables, specified
Vague advice to “make tables” helps nobody, so here are the exact columns. Vitamins table: vitamin → chemical name → deficiency disease → richest source (A-retinol-night blindness-carrot; B1-thiamine-beriberi; C-ascorbic-scurvy-citrus; D-calciferol-rickets-sunlight; E-tocopherol-fertility issues; K-phylloquinone-bleeding). Alloys table: alloy → composition → use (brass Cu+Zn–utensils; bronze Cu+Sn–medals; steel Fe+C–construction; stainless Fe+Cr+Ni–cutlery; solder Pb+Sn–joints; amalgam Hg+metal–dental). Laws-and-units table: law → statement in words → unit it defines (Newton's three, Ohm's V=IR, Archimedes buoyancy, Pascal pressure transmission, Joule heating). Three tables, three pages, roughly fourteen marks a year. Write them by hand once — the act of tabulating is itself the memorisation — then revise only the tables, never the chapters behind them.
Traps: how SSC phrases what you know
Knowing the fact is half the battle; recognising its costume is the other half. SSC loves reversed pairs (“which vitamin deficiency causes rickets?” vs “excess of which vitamin is toxic?”), odd-one-out sets (three alloys with copper, one without), everyday framings (pressure cooker whistle = steam pressure; soap cleaning = surface tension/emulsification; rainbow order), and number-adjacent facts (pH of blood 7.4, normal body temp 37°C, speed of sound vs light). The defence is PYQ-pattern reading: after solving five years, you stop seeing questions and start seeing templates wearing new clothes. Mark every miss back into the three tables with a star — starred rows are your final-week universe. And on exam day, attempt science in one twelve-minute block at the end of GK: facts are binary (known or not), so lingering never converts a miss, while the saved minutes rescue reasoning questions elsewhere.
Biology-first: why the order matters
Do Biology before Physics before Chemistry, and there is a reason beyond taste. Biology questions are the most fact-dense and the least derivable — either the deficiency table is in your head or the mark is gone — so they deserve fresh-brain hours (days 1–10, mornings). Physics rewards understanding over memory (grasp the law once, recognise all its costumes), making it ideal middle-order work. Chemistry sits last because half of it (acids-bases-salts, periodic trends, alloys) overlaps the other two subjects' tables and revises itself while you revise them. Within Biology, prioritise human systems over plant detail (roughly 3:1 in past papers), and within systems, prioritise the big four — digestive, respiratory, circulatory, nervous — with one pathway each (food's journey, oxygen's journey, blood's circuit, reflex arc). Pathways beat parts: examiners ask processes (“where is bile produced vs stored?”) more than labels. One Lucent Science section plus these tables plus PYQs remains the entire syllabus — the order above is just how you spend thirty days without wasting one.
Exam-day execution
Science answers in this paper are worth attempting fast and abandoning faster: mark what you know in the first pass (roughly 60% if the tables held), star the doubtful, and never spend more than forty seconds on a single fact question — its answer will not emerge from staring. Reserve the final ten minutes for starred items, where elimination (two options sharing a root are usually both wrong; absolute words like “only” usually signal the trap) converts a few. And keep the three tables' images in your head as literal pages: students who visualise the vitamin row or the alloy column during the paper retrieve faster than those who search memory as prose. Thirty days built the tables; twelve minutes spend them. That is the whole economics of this section.
Thirty days, asked plainly
NCERT or Lucent? Lucent's Science section for breadth plus your three tables for depth. Full NCERTs cost three weeks for the same marks the tables secure in three days — unless you have months, in which case read Class 10 Science once for intuition.
Numericals — should I practise them? Only statement-level ones: pH values, unit conversions, mirror/lens sign conventions as words. Anything needing algebra has not appeared in five years; skip derivation practice entirely.
Where are the PYQs? Under One Day → Science on Sulaksh as verified, or All PYQs. Star every miss into your tables — that starred set is the final revision.