World's Hardest Science Quiz You'll Ever Take!

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  • 1/10 Questions
    According to NASA, what is the nitrogen level in the Earth's atmosphere? - ProProfs

    According to NASA, what is the nitrogen level in the Earth's atmosphere?

    • Approximately 78%
    • Approximately 15%
    • Approximately 7%
    • Approximately 5%
    • Approximately 2%
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About This Quiz

Challenge your scientific knowledge with our Hard Science Quiz! Put your expertise to the test and tackle some of the most complex science questions from diverse disciplines. Whether you are a science enthusiast or have a curious mind, this quiz will provide an exciting opportunity to expand your knowledge and showcase your scientific prowess. So, get ready to take this challenge and see if you have what it takes to conquer the hardest science questions!

Worlds Hardest Science Quiz Youll Ever Take! - Quiz

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  • 2. 
    Do South America and Africa fit together like a jigsaw puzzle? - ProProfs

    Do South America and Africa fit together like a jigsaw puzzle?

    • It appears to be somewhere roughly fit.  

    • Yes, they do!

    • No

    • It looks like two joined circles. 

    Correct Answer
    A. Yes, they do!
    Explanation
    The given answer states that South America and Africa do fit together like a jigsaw puzzle. This suggests that the landmasses of South America and Africa can be aligned and connected in a way that resembles the interlocking pieces of a puzzle.

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  • 3. 
    What's the shape of the Earth? - ProProfs

    What's the shape of the Earth?

    • Round

    • Flat

    • Has no shape

    • Spheroid

    Correct Answer
    A. Spheroid
    Explanation
    The correct answer is "Spheroid". This is because the Earth is not a perfect sphere, but rather an oblate spheroid. It is slightly flattened at the poles and bulging at the equator due to its rotation. This shape is a result of the Earth's gravity pulling the mass towards the center, causing it to be compressed at the poles and expanded at the equator.

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  • 4. 
    Give an example of a decapod. - ProProfs

    Give an example of a decapod.

    • They don't exist

    • Crab

    • Beetle

    • Lizards

    • Unicorns

    Correct Answer
    A. Crab
    Explanation
    A decapod is a type of crustacean that has ten legs. Crabs are one of the most well-known examples of decapods. They have a hard exoskeleton, a pair of claws, and a body that is divided into a cephalothorax and an abdomen. They are commonly found in oceans, seas, and other bodies of water, and are known for their sideways walking and ability to regenerate lost limbs.

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  • 5. 
    Which is the largest animal that is at present thriving? - ProProfs

    Which is the largest animal that is at present thriving?

    • Blue Whale 

    • Crocodile

    • Elephant

    • Tiger

    Correct Answer
    A. Blue Whale 
    Explanation
    The blue whale is the largest animal that is currently thriving. It is known to be the largest animal to have ever existed on Earth. With an average length of about 82-105 feet and weighing around 200 tons, the blue whale surpasses the size of any other animal. It is a marine mammal that primarily feeds on small shrimp-like animals called krill. Despite being hunted to near extinction in the past, conservation efforts have helped the blue whale population recover, making it the largest thriving animal today.

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  • 6. 
    Which is a hypothetical string theory weightless particle? - ProProfs

    Which is a hypothetical string theory weightless particle?

    • Graviton

    • Earth Worm Jim

    • Anti-matter

    • Baryonic Matter

    Correct Answer
    A. Graviton
    Explanation
    A graviton is a hypothetical particle in string theory that is believed to be responsible for carrying the force of gravity. It is considered weightless because it does not have mass. While the other options mentioned are not weightless particles, the graviton fits the description of a hypothetical string theory particle that is weightless.

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  • 7. 
    What kind of small objects compose much of the universe? - ProProfs

    What kind of small objects compose much of the universe?

    • Atoms

    • Dark matter

    • Anti-matter

    • None of the above

    Correct Answer
    A. Dark matter
    Explanation
    While atoms make up all the matter we see (like stars, planets, and living things), they account for only about 5% of the total mass-energy content of the universe. A much larger portion, around 27%, is thought to be composed of dark matter, which interacts with gravity but not with light, making it invisible and detectable only through its gravitational effects. Anti-matter exists but is extremely rare, and none of the above would be incorrect because dark matter is believed to make up much of the universe's mass. The remaining majority of the universe is composed of dark energy.

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  • 8. 
    What is the dodo's closest relative? - ProProfs

    What is the dodo's closest relative?

    • The Southeast Asian Nicobar pigeon

    • Eagle

    • Raptors 

    • Chicken

    Correct Answer
    A. The Southeast Asian Nicobar pigeon
    Explanation
    The dodo's closest relative is the Southeast Asian Nicobar pigeon. This is because both species belong to the same family of birds, Columbidae. They share similar physical characteristics and behaviors, such as their large size and inability to fly long distances. Additionally, genetic studies have shown a close evolutionary relationship between the dodo and the Nicobar pigeon.

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  • 9. 

    What is the chemical symbol for the element commonly known as "table salt"?

    • Ti 

    • NaCl 

    • H2O 

    • CO2

    Correct Answer
    A. NaCl 
    Explanation
    NaCl: This is the correct answer. NaCl is the chemical symbol for sodium chloride, which is the chemical name for common table salt. It consists of one sodium (Na) atom and one chlorine (Cl) atom bonded together.

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  • 10. 
    Which is the longest-lived animal ever discovered, according to the Guinness World Records?  - ProProfs

    Which is the longest-lived animal ever discovered, according to the Guinness World Records? 

    • Blue Whale

    • Brachiosaurus

    • Quahog Clam

    • Cat

    Correct Answer
    A. Quahog Clam
    Explanation
    The Quahog Clam is the longest-lived animal ever discovered, according to the Guinness World Records. These clams have been known to live for over 500 years.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Sep 22, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Nov 29, 2009
    Quiz Created by
    Dinodude

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