Introduction
Science is humanity's greatest tool for separating empirical truth from myth. From the microscopic organelles inside human somatic cells to supermassive black holes anchoring distant galaxies, the scientific method empowers us to understand and engineer the universe around us.
Whether you are preparing for competitive academic exams, brushing up for a pub trivia night, or feeding an insatiable intellectual curiosity, having a solid grasp of core STEM principles is essential in a technology-driven world.
We have curated 40 verified questions across four essential scientific domains: Biology, Chemistry, Physics, and Earth & Space Science. Each question includes immediate answer feedback and comprehensive explanations detailing the underlying scientific mechanisms.
Round 1: Biology & Life Sciences (Qs 1–10)
Biology is the study of life in all its intricate elegance—from molecular genetics inside cell nuclei to the complex ecological relationships governing global biomes.
Test your knowledge on cellular organelles, Watson-Crick DNA base pairings, and the genetic code of living organisms.
Explore cells, chromosomes, DNA nucleotides, photosynthesis, organ systems, and evolutionary biology.
Which organelle is known as the "powerhouse of the cell" for generating ATP via cellular respiration?
If you uncoiled and laid end-to-end all the DNA molecules inside the roughly 37 trillion cells of a single adult human body, it would stretch approximately 10 billion miles—far enough to reach Pluto and back!
Round 2: Chemistry & Molecular Matter (Qs 11–20)
Chemistry is the central science linking physics to biology. Everything in the physical universe—from the air you breathe to the screen in your hands—is composed of atomic configurations and electron bonds.
See if you understand Dmitri Mendeleev’s table, covalent bonds, and the fourth state of matter.
Navigate the periodic table: atomic numbers, chemical bonding, pH scales, noble gases, and states of matter.
What is the chemical symbol for Gold on the Periodic Table of Elements?
While photons travel from the Sun’s surface to Earth in just 8 minutes and 20 seconds, it takes a photon generated by nuclear fusion in the Sun’s core between 100,000 and 1,000,000 years to slowly diffuse through the dense solar plasma to the surface.
Round 3: Physics & Universal Forces (Qs 21–30)
Physics uncovers the fundamental laws governing space, time, matter, and energy. From the celestial orbits of planetary systems down to the subatomic uncertainty of quantum wave-functions, physics is the language of nature.
Test your grasp of thermodynamic entropy, Heisenberg’s uncertainty, and the universal speed of light.
Examine Newton’s laws, Einstein’s mass-energy equivalence, thermodynamics, optics, and quantum mechanics.
What is Isaac Newton's First Law of Motion, also known as the Law of Inertia?
In 2007, thousands of microscopic tardigrades were launched into open low-Earth orbit on the European FOTON-M3 mission. After 10 days of direct exposure to the vacuum, freezing cold, and cosmic UV radiation of space, over 68% survived upon return to Earth and laid healthy eggs.
Round 4: Earth Science, Astronomy & Cosmology (Qs 31–40)
Zoom out from our planet’s molten iron core to the farthest observable reaches of the cosmos. Earth science explains the living crust beneath our feet, while astronomy looks backward in time across billions of light-years.
Finish your journey through the age of the Earth, planetary atmospheres, and the cosmic aftermath of the Big Bang.
Journey through plate tectonics, seismic P-waves, solar system giants, black holes, and the cosmic microwave background.
What is the estimated age of Planet Earth according to radiometric dating of ancient zircons and meteorites?
Fundamental Constants of the Universe
A quick reference guide to the immutable mathematical constants that govern physical laws throughout the cosmos.
| Fundamental Constant | Symbol | Standard Value | Significance in Modern Physics |
|---|---|---|---|
| Speed of Light in Vacuum | c | 299,792,458 m/s | Cosmic speed limit; relates mass and energy in E = mc². |
| Planck Constant | h | 6.62607015 × 10⁻³⁴ J·s | Fundamental quantum scale connecting photon energy to frequency. |
| Gravitational Constant | G | 6.67430 × 10⁻¹¹ m³/(kg·s²) | Determines gravitational attraction between massive bodies. |
| Avogadro Constant | N_A | 6.02214076 × 10²³ mol⁻¹ | Number of constituent particles in one mole of a chemical substance. |
| Boltzmann Constant | k_B | 1.380649 × 10⁻²³ J/K | Relates the thermal kinetic energy of particles to temperature. |
| Elementary Charge | e | 1.602176634 × 10⁻¹⁹ C | Magnitude of electric charge carried by a single proton or electron. |
Serendipitous Breakthroughs in Science History
How accidental discoveries and bold intuition transformed our world:
Alexander Fleming returned from a two-week holiday to find a contaminated Petri dish where Penicillium notatum mold had dissolved surrounding colonies of Staphylococcus bacteria, discovering the first life-saving antibiotic.
Dmitri Mendeleev wrote elements on the backs of playing cards. Exhausted after days of trying to find an ordering pattern, he fell asleep and later recalled: "In a dream I saw a table where all the elements fell into place as required."
Arno Penzias and Robert Wilson heard a persistent background hiss in their radio telescope antenna. After scrubbing pigeon droppings from the horn, they realized they had detected the Cosmic Microwave Background—the echo of the Big Bang.
Wilhelm Röntgen was experimenting with cathode ray tubes when he noticed a fluorescent screen across the room glowing in the dark. He photographed his wife Bertha’s hand, producing the world’s first X-ray image showing her wedding ring.