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Want to boost your science and tech knowledge? This Science and Technology Quiz is perfect for students from class 7 to 9, competitive exam aspirants, and enthusiasts who love staying updated with innovations. Science shapes our world, from space exploration to AI breakthroughs. Quizzes enhance recall, improve problem-solving skills, and make learning fun. Test yourself with 20 engaging questions, complete with answers and explanations. Ready to challenge your knowledge? Let’s begin!
Science and Technology Quiz
Q1. What does DNA stand for?
A. Deoxyribonucleic Acid
B. Deoxyribose Nucleic Acid
C. Dioxyribonucleic Acid
D. Dioxyribose Nucleic Acid
Answer: A. Deoxyribonucleic Acid
Explanation: DNA, or Deoxyribonucleic Acid, is the hereditary material in humans and almost all other organisms.
Q2. Which planet is known as the Red Planet?
A. Venus
Reader’s Digest
B. Mars
C. Jupiter
D. Saturn
Answer: B. Mars
Explanation: Mars is often called the Red Planet due to its reddish appearance, which is caused by iron oxide on its surface.
Q3. What is the speed of light in a vacuum?
A. Approximately 300,000 kilometres per second
B. Approximately 150,000 kilometres per second
C. Approximately 450,000 kilometres per second
D. Approximately 600,000 kilometres per second
Answer: A. Approximately 300,000 kilometres per second
Explanation: The speed of light in a vacuum is about 299,792 kilometres per second, commonly rounded to 300,000 kilometres per second.
Q4. Who is known as the father of modern physics?
A. Isaac Newton
B. Albert Einstein
C. Galileo Galilei
D. Niels Bohr
Answer: B. Albert Einstein
Explanation: Albert Einstein is often referred to as the father of modern physics due to his contributions to the theory of relativity and quantum mechanics.
Q5. What is the chemical symbol for gold?
A. Au
B. Ag
C. Gd
D. Go
Answer: A. Au
Explanation: The chemical symbol for gold is ‘Au’, derived from its Latin name ‘Aurum’.
Q6. Which gas is most abundant in Earth’s atmosphere?
A. Oxygen
B. Nitrogen
C. Carbon Dioxide
D. Hydrogen
Answer: B. Nitrogen
Explanation: Nitrogen makes up about 78% of Earth’s atmosphere, making it the most abundant gas.
Q7. What does CPU stand for in computer terminology?
A. Central Processing Unit
B. Computer Personal Unit
C. Central Power Unit
D. Computer Processing Unit
Answer: A. Central Processing Unit
Explanation: The CPU, or Central Processing Unit, is the primary component of a computer that performs most of the processing inside a computer.
Q8. Which planet is closest to the sun?
A. Venus
B. Earth
C. Mercury
D. Mars
Answer: C. Mercury
Explanation: Mercury is the closest planet to the sun in our solar system.
Q9. What is the powerhouse of the cell?
A. Nucleus
B. Mitochondria
C. Ribosome
D. Endoplasmic Reticulum
Answer: B. Mitochondria
Explanation: Mitochondria are known as the powerhouse of the cell because they generate most of the cell’s supply of adenosine triphosphate (ATP), used as a source of chemical energy.
Q10. Which element has the highest melting point?
A. Carbon
B. Tungsten
C. Iron
D. Platinum
Answer: B. Tungsten
Explanation: Tungsten has the highest melting point of all elements, at 3,422 degrees Celsius (6,192 degrees Fahrenheit).
Q11.What is the most abundant element in the Earth’s crust?
A. Silicon
B. Oxygen
C. Aluminum
D. Iron
Answer: B. Oxygen
Explanation: Oxygen makes up about 46.6% of the Earth’s crust by weight, followed by silicon.
Q12. Who invented the first practical telephone?
A. Alexander Graham Bell
B. Thomas Edison
C. Nikola Tesla
D. Guglielmo Marconi
Answer: A. Alexander Graham Bell
Explanation: Alexander Graham Bell patented the first practical telephone in 1876.
Q13. Which programming language is commonly used for artificial intelligence (AI)?
A. Python
B. C++
C. Java
D. JavaScript
Answer: A. Python
Explanation: Python is widely used in AI and machine learning due to its simplicity and vast library support.
Q14. What is the smallest unit of matter?
A. Molecule
B. Atom
C. Proton
D. Electron
Answer: B. Atom
Explanation: Atoms are the basic building blocks of matter, consisting of protons, neutrons, and electrons.
Q15. Which planet in the solar system has the most moons?
A. Jupiter
B. Saturn
C. Uranus
D. Neptune
Answer: B. Saturn
Explanation: Saturn has more than 80 moons, including the largest, Titan.
Q16. What is the main function of white blood cells?
A. Transport oxygen
B. Fight infections
C. Regulate body temperature
D. Carry nutrients
Answer: B. Fight infections
Explanation: White blood cells (WBCs) help defend the body against infections and diseases.
Q17. Which scientist developed the theory of evolution by natural selection?
A. Gregor Mendel
B. Charles Darwin
C. Louis Pasteur
D. Albert Einstein
Answer: B. Charles Darwin
Explanation: Charles Darwin proposed the theory of evolution by natural selection in his 1859 book On the Origin of Species.
Q18. What is the chemical formula for table salt?
A. NaCl
B. H2O
C. CO2
D. KCl
Answer: A. NaCl
Explanation: Table salt is composed of sodium (Na) and chloride (Cl) ions.
Q19. What type of energy is produced by moving water?
A. Solar energy
B. Wind energy
C. Hydroelectric energy
D. Geothermal energy
Answer: C. Hydroelectric energy
Explanation: Hydroelectric power is generated by harnessing the kinetic energy of flowing water to produce electricity.
Q20. What is the name of the largest organ in the human body?
A. Heart
B. Liver
C. Skin
D. Lungs
Answer: C. Skin
Explanation: The skin is the body’s largest organ, serving as a protective barrier against the environment.
FAQs – Science and Technology Quiz
Good questions include topics on physics, chemistry, biology, space exploration, and modern technological advancements. Example: “Who invented the World Wide Web?” (Answer: Tim Berners-Lee).
Websites like Leverage Edu, Jagran Josh, and Britannica provide quiz questions for exams like UPSC, SSC, and bank exams. You can also find quiz books and mobile apps dedicated to general knowledge.
Trending topics include AI and machine learning, space missions (like Artemis and Chandrayaan), quantum computing, renewable energy, and advancements in medical technology.
Read science magazines (like Scientific American or Nature), follow tech news websites (like TechCrunch or Wired), and practice quizzes available online.
Regularly update yourself with the latest discoveries, watch educational YouTube channels, read books on technology, and practice mock quizzes.
AI is revolutionising industries by automating tasks, improving efficiency, and enabling advancements in healthcare, robotics, and cybersecurity.
5G provides faster internet speeds, lower latency, and better connectivity, enabling innovations like smart cities, IoT, and real-time data transfer.
Recent advancements include private space travel (SpaceX, Blue Origin), NASA’s Artemis program for Moon missions, and India’s Chandrayaan-3 mission.
Renewable energy sources like solar, wind, and hydropower reduce carbon emissions, decrease reliance on fossil fuels, and provide sustainable energy solutions.
Quantum computing uses quantum bits (qubits) to process information at unprecedented speeds, revolutionizing fields like cryptography, drug discovery, and complex simulations.
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