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The 2023 Megaquiz is here!

By , 4 January 2023

Looking for some science trivia? This is a random selection of questions from our 2022 quizzes. If you want more questions, reload this web page and we’ll fetch you a fresh batch!


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#1. Padparadscha is the name for the orange variety of what popular gemstone?

Sapphires can come in almost any colour except red (these are rubies). Orange sapphires are among the rarest of all sapphires ranging in colour from a brilliant orange to orange-pink.

#2. Over the entire Earth, how many lightning strikes are there every minute?

There are about 100 lightning flashes on Earth every second, or 6,000 every minute!

#3. What wavelengths are picked up by the new James Webb Space Telescope?

The James Webb Space Telescope can detect orange and red light, but mostly uses even redder, infrared light.

#4. What is the name for a triangle with sides that are all different lengths, and all the angles are a different size?

A scalene triangle has sides of all different lengths, and all different angles.

#5. How do diamond pythons kill their prey?

Diamond pythons are non-venomous, and they constrict their prey to kill them. They can’t kill you, but they will give you a nasty bite if you annoy them too much!

#6. Salt can kill some bacteria, but how does it work?

Salt can pull the water out of living cells, in a process called osmosis.

#7. What does this emoji 😆 mean to most people?

The ‘smiling face with open mouth and tightly closed eyes’ emoji is the world’s most confusing. In a US study, scientists found that half of people thought it was a positive emoji, and half thought it was negative!

#8. One of the essential minerals in the human body is salt. How much salt (NaCl) is in the average adult human body?

The average adult human body contains about 250 grams of salt, roughly the weight of a block of butter. If you don’t have enough salt, your body suffers an electrolyte imbalance called hyponatremia.

#9. Where do astronauts on the International Space Station get their water from?

It’s expensive to launch things into space, so astronauts recycle as much as they can, including drinking water!

#10. Lots of species, including emus, red kangaroos and red-bellied black snakes, are endemic to Australia. What does endemic mean?

Endemic species can only be found in one place in the world. About 85% of Australian mammals, 45% of Australian birds and almost 90% of Australian freshwater fish are endemic.

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