Published concept labs
Railway general-science concept map
A set of published science labs for visual review of motion, electricity, light, gases, chemistry, and cell biology alongside your railway-exam materials.
How to use this page
Open a lab, vary one input at a time, and write down the relationship you observe. Then return to your textbook or problem set and explain the same relationship without the visual aid.
Physics systems
Inspect motion, DC circuits, refraction, and gas relationships using the corresponding published simulations.
Published interactive lab
Projectile Motion Simulator — Interactive Physics Lab
Launch a projectile with adjustable angle, speed, gravity, mass, and air resistance. Compare planets, target a landing point, and read live range and height data.
Concepts: projectile motion, parabolic trajectory, air resistance
Published interactive lab
Circuit Lab — Interactive Schematic & DC Simulator
Build and simulate DC circuits online with this free circuit lab. Place resistors, capacitors, LEDs, voltage sources, and more, then run nodal analysis to see voltage, current, and power.
Concepts: Ohm's law, nodal analysis, Kirchhoff's laws
Published interactive lab
Refraction Lab — Snell's Law & Total Internal Reflection
Explore Snell's law and total internal reflection with this free online refraction simulator. Choose optical media, set the incident angle, and observe refraction, reflection intensity, and TIR with white light.
Concepts: Snell's law, refraction, total internal reflection
Published interactive lab
Ideal Gas Law Simulator — PV, TV, PT Diagrams Interactive
Explore the ideal gas law with this free online simulator. Adjust pressure, volume, temperature, and moles for helium, nitrogen, and CO₂. Plot PV, TV, and PT diagrams in real time.
Concepts: ideal gas law, Boyle's law, Charles's law
Chemistry and biology
Revisit periodic trends, cells, and ecosystem interactions with the published science labs.
Published interactive lab
Interactive Periodic Table – Element Properties Online
Explore all 118 elements with periodic trends, electron configurations, and atomic data in this free interactive online periodic table for chemistry learners.
Concepts: periodic trends, electron configuration, ionization energy
Published interactive lab
Cell Lab: Observe & Analyze Living Cells
Examine living cell behavior — membrane transport, organelle activity, and cellular response — in this free online cell lab simulation for biology students.
Concepts: osmosis, membrane transport, cell physiology
Published interactive lab
Ecosystem Balance: Trophic Cascades & Stability
Discover how removing or adding a species tips an ecosystem in this free interactive ecosystem balance simulation — explore trophic cascades and keystone species.
Concepts: trophic cascade, keystone species, ecosystem stability