All Free Everyday Science MCQs with Answers
Every Everyday Science question in the bank, across all chapters, each with the correct answer and a written explanation. Free and unlimited, with no account needed.
1,934 questions · page 1 of 97
- A. Rickets
- B. Scurvy
- C. Beriberi
- D. Night blindness
Explanation: Vitamin C (ascorbic acid) is required for collagen synthesis; its deficiency causes scurvy, marked by bleeding gums and poor wound…
Correct answer: Scurvy- A. 35 °C
- B. 37 °C
- C. 39 °C
- D. 41 °C
Explanation: Normal human body temperature is approximately 37 °C, which equals 98.6 °F.
Correct answer: 37 °C- A. Water
- B. Steel
- C. Vacuum
- D. Air
Explanation: Sound is a mechanical wave and requires a material medium whose particles can vibrate.
Correct answer: Vacuum- A. Troposphere
- B. Stratosphere
- C. Mesosphere
- D. Thermosphere
Explanation: The ozone layer lies in the stratosphere, roughly 15 to 35 kilometres above the earth, where it absorbs most of the sun’s harmful…
Correct answer: Stratosphere- A. Sodium bicarbonate
- B. Sodium chloride
- C. Calcium carbonate
- D. Potassium chloride
Explanation: Table salt is sodium chloride, NaCl. Sodium bicarbonate (NaHCO₃) is baking soda and calcium carbonate (CaCO₃) is limestone — both common…
Correct answer: Sodium chloride- A. Venus
- B. Mercury
- C. Earth
- D. Mars
Explanation: Mercury is the closest planet to the Sun and also the smallest planet in the solar system.
Correct answer: Mercury- A. Light Emitting Diode
- B. Low Energy Device
- C. Linear Electric Display
- D. Light Enhanced Detector
Explanation: LED stands for Light Emitting Diode — a semiconductor that emits light when current flows through it in the forward direction.
Correct answer: Light Emitting Diode- A. AB positive
- B. A negative
- C. O negative
- D. B positive
Explanation: O negative red cells carry neither A nor B antigens nor the Rh D antigen, so they can be transfused to a recipient of any blood group in…
Correct answer: O negative- A. Mars
- B. Jupiter
- C. Saturn
- D. Uranus
Explanation: Saturn is famous for its broad, bright system of icy rings, which makes it the standard answer.
Correct answer: Saturn- A. December
- B. February
- C. May
- D. None
Explanation: February is short enough that, in some years, its interval contains no new moon.
Correct answer: February- A. Venus
- B. Pluto
- C. Jupiter
- D. None
Explanation: Jupiter is the largest planet in the Solar System, with a mass greater than all the other planets combined.
Correct answer: Jupiter- A. Reflection of light
- B. Polarization of light
- C. refraction of light
- D. Interference of light
- E. None of these
Explanation: Starlight is repeatedly refracted by moving layers of Earth's atmosphere, making the star's apparent brightness and position fluctuate.
Correct answer: refraction of light- A. Energy
- B. Time
- C. Power
- D. Distance
- E. None of these
Explanation: A parsec is a large astronomical unit of distance, equal to about 3.26 light-years.
Correct answer: Distance- A. In asteroid belt between the orbits of Mars and Jupiter
- B. In asteroid belt between the orbits of Mars and Venus
- C. In asteroid belt between the orbits of Jupiter and Venus
- D. Everywhere in the sky
- E. None of these
Explanation: Most asteroids orbit the Sun in the main asteroid belt between Mars and Jupiter. Gravitational effects from Jupiter help maintain this belt.
Correct answer: In asteroid belt between the orbits of Mars and Jupiter- A. Aphelion
- B. Perihelion
- C. Perigee
- D. Apogee
- E. None of these
Explanation: Aphelion is the point in Earth's orbit farthest from the Sun, while perihelion is the nearest point.
Correct answer: Aphelion- A. Orion
- B. Columbia
- C. Canis Major
- D. Taurus
- E. None of these
Explanation: Orion is commonly described as the most prominent or magnificent constellation because it is large, bright and easily recognized by its…
Correct answer: Orion- A. 88 days
- B. 365 days
- C. 2 years
- D. 98 days
- E. None of these
Explanation: Mercury is the closest planet to the Sun and completes one orbit in about 88 Earth days.
Correct answer: 88 days- A. Archimedes
- B. William Gilbert
- C. Nicolas Copernicus
- D. Michael Faraday
- E. None of these
Explanation: Nicolaus Copernicus founded modern astronomy by proposing the heliocentric model, placing the Sun at the centre of the planetary system.
Correct answer: Nicolas Copernicus- A. Endobiology
- B. Exobiology
- C. Enterobiology
- D. Neobiology
- E. Micro biology
Explanation: Exobiology, also called astrobiology, studies the possibility, origin and distribution of life beyond Earth.
Correct answer: Exobiology- A. James webb 5.0 telescope
- B. Giant Magellan space telescope
- C. The Vainu Bappu Telescope
- D. Hubble space telescope 2.0
Explanation: The Giant Magellan Telescope is designed as an extremely large ground-based optical telescope, using several primary mirrors to achieve…
Correct answer: Giant Magellan space telescope