Science & Technology Trivia Quiz 5

10 questions · 4 multiple choice · 6 number answers · scored out of 1000

Answer everything below, then hit finish for a scored breakdown. Number questions give partial credit for close guesses, so always take a shot.

From starlight and the Moon to atoms and living things, these ten questions cross several corners of science. Try your guesses, then explore the short explanations and source links with your score.

  1. Multiple choicevery easy
    As seen from Earth, which star appears brightest in the night sky?
  2. Number answermedium

    Hint: Enter the travel time in whole minutes.

  3. Number answermedium
  4. Multiple choiceeasy
    Which theory describes the universe expanding from an early hot, dense state?
  5. Number answermedium

    Hint: Count its atria and ventricle.

  6. Number answerhard
  7. Multiple choiceeasy
    Which gas produces a red-orange glow in an illuminated advertising tube?
  8. Number answereasy

    Hint: Enter a percentage from 0 to 100.

  9. Number answermedium
  10. Multiple choiceeasy
    Which of these space telescopes launched on 25 December 2021?

0 of 10 answered · 10 still blank (they score 0)

Answer key

Contains spoilers for all 10 questions. Expand only when you are done playing.

Answers checked . Explanations and source links are included below.

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  1. As seen from Earth, which star appears brightest in the night sky?Sirius

    Sirius appears brightest in our night sky. Apparent brightness is how bright a star looks from Earth, which depends on its distance as well as its light output. NASA: Sirius and Procyon

  2. To the nearest whole minute, how long does sunlight take to reach Earth?8

    The answer rounds to eight minutes. Earth is about 150 million kilometres from the Sun on average, so even light takes several minutes to cross that distance. NASA: Earth facts

  3. How many chromosome pairs are typically found in the nucleus of a human body cell?23

    A typical human body cell has 23 pairs, making 46 chromosomes in total. Egg and sperm cells carry one set of 23 chromosomes rather than pairs. NHGRI: diploid cells

  4. Which theory describes the universe expanding from an early hot, dense state?The Big Bang Theory

    The Big Bang model describes an early universe that expanded and cooled. It does not by itself explain what caused the universe to exist. NASA: the history of the universe

  5. How many chambers does an adult frog's heart have?3

    An adult frog has a three-chambered heart: two atria receive blood and one ventricle pumps it onward. OpenStax: amphibian circulation

  6. How many lepton flavours are in the Standard Model, without counting antiparticles separately?6

    There are six: the electron, muon and tau, plus a corresponding neutrino for each. Their antiparticles are not counted as additional flavours here. CERN: the Standard Model

  7. Which gas produces a red-orange glow in an illuminated advertising tube?Neon

    Neon produces the familiar red-orange glow in a discharge tube. Signs in other colours can use other gases, even when people call them neon signs. Royal Society of Chemistry: neon

  8. Roughly what percentage of a typical adult man's body mass is water? Round to the nearest ten percent.60

    About 60% is a common estimate for adult men. The proportion varies with age and body composition, so it is not a fixed percentage for every person. U.S. Geological Survey: water in the human body

  9. How many commonly named Moon phases make up one lunar cycle?8

    Eight names describe the cycle: new, waxing crescent, first quarter, waxing gibbous, full, waning gibbous, third quarter and waning crescent. The visible sunlit portion changes continuously between them. NASA: Moon phases

  10. Which of these space telescopes launched on 25 December 2021?James Webb Space Telescope

    The James Webb Space Telescope launched on 25 December 2021. It observes the universe mainly in infrared light. NASA: James Webb Space Telescope

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