Science Quiz: Basic Questions And Answers

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    What is photosynthesis? - ProProfs

    What is photosynthesis?

    • A process used by animals to consume food
    • A process plants use to convert sunlight into chemical energy
    • A method of water purification
    • A geological phenomenon
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About This Quiz

Are you curious about the world around you? Do you love exploring how things work? Then get ready to put your knowledge to the test with our exciting science quiz! This interactive quiz is designed to challenge your understanding of basic scientific concepts in a fun and engaging way.

No matter if you're a budding scientist or just looking to brush up on your knowledge, this science quiz is perfect for beginners. We've compiled a variety of basic science questions with answers, covering topics like biology, chemistry, physics, and astronomy. So, what are you waiting for? Plunge in and see how well you know your science!

Science Quiz: Basic Questions And Answers - Quiz

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  • 2. 
    Which planet is the largest planet in our solar system? - ProProfs

    Which planet is the largest planet in our solar system?

    • Mars

    • Neptune

    • Jupiter

    • Earth

    Correct Answer
    A. Jupiter
    Explanation
    Jupiter is the largest planet in our solar system. It has a diameter of about 143,000 kilometers, making it more than 11 times the diameter of Earth. Jupiter's massive size is due to its high concentration of gasses, primarily hydrogen and helium. Its immense gravity also contributes to its size, allowing it to gather and hold onto a large amount of gas and other materials. Additionally, Jupiter has a strong magnetic field and numerous moons, further showcasing its dominance in our solar system.

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  • 3. 
    How many bones does an adult human usually have? - ProProfs

    How many bones does an adult human usually have?

    • 200

    • 206

    • 221

    • 242

    Correct Answer
    A. 206
    Explanation
    An adult human usually has 206 bones. Children actually have more than 206 bones, but some of their bones fuse together as they grow and become adults. This process, known as ossification, occurs throughout childhood and adolescence. By the time a person reaches adulthood, many of their bones have fused together to form the 206 bones typically found in an adult human body. This fusion of bones helps provide stability and support for the body's structure. Ossification also plays a role in the overall growth and development of an individual.

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  • 4. 
    What is required for fire to burn? - ProProfs

    What is required for fire to burn?

    • Carbon

    • Oxygen

    • Nitrogen

    • None of these

    Correct Answer
    A. Oxygen
    Explanation
    Fire cannot burn without oxygen because oxygen is necessary for the process of combustion. When a fire burns, it undergoes a chemical reaction called oxidation, in which the fuel combines with oxygen to release heat and light. Without oxygen, there is no source of matter to react with the fuel, and therefore, the fire cannot sustain itself. Carbon usually reacts with oxygen in a combustion reaction but does not undergo that reaction if oxygen is not present.

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  • 5. 
    What is the hardest natural substance on Earth? - ProProfs

    What is the hardest natural substance on Earth?

    • Diamond

    • Quartz

    • Gold

    • Iron

    Correct Answer
    A. Diamond
    Explanation
    Diamond is renowned as the hardest natural substance found on Earth. Its unparalleled hardness and durability arise from the strong covalent bonding between the carbon atoms in a diamond's crystal structure. This characteristic makes diamonds highly valuable not only as gemstones but also industrially for cutting, grinding, and drilling other materials. Diamonds are also highly sought after for their brilliance and ability to refract light, making them a popular choice for jewelry. The unique properties of diamonds have led to extensive research and development in the field of materials science to explore potential applications in various industries.

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  • 6. 
    Of all measurements, which speed is considered the fastest? - ProProfs

    Of all measurements, which speed is considered the fastest?

    • Speed of sound

    • Speed of light

    • Speed of Earth's rotation

    • All are equal

    Correct Answer
    A. Speed of light
    Explanation
    The speed of light in a vacuum is considered the fastest speed possible in the universe. It is a fundamental constant in physics and is approximately 299,792,458 meters per second. The speed of sound and the speed of Earth's rotation are significantly slower than the speed of light. The speed of light plays a crucial role in many aspects of modern science and technology, including the theory of relativity and telecommunications. Its incredible velocity allows us to observe distant celestial objects and understand the nature of the universe.

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  • 7. 
    Which scientist used one of the first telescopes to observe planets and stars? - ProProfs

    Which scientist used one of the first telescopes to observe planets and stars?

    • Isaac Newton

    • Galileo Gallelli

    • James Watt

    • Roger Bacon

    Correct Answer
    A. Galileo Gallelli
    Explanation
    Galileo Galilei was an Italian astronomer and physicist who made significant contributions to the field of astronomy. He constructed his own telescope in 1609, which allowed him to make groundbreaking observations of celestial bodies and further our understanding of the universe. His findings revolutionized astronomy and laid the foundation for future scientific discoveries. Galileo was one of the scientists who proved the earth revolved around the sun.

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  • 8. 
    Approximately how much time does light take to travel from Sun to Earth? - ProProfs

    Approximately how much time does light take to travel from Sun to Earth?

    • 20 minutes

    • 1 hour

    • 8 minutes and 20 seconds

    • 3 days

    Correct Answer
    A. 8 minutes and 20 seconds
    Explanation
    Light takes approximately 8 minutes and 20 seconds to travel from the Sun to Earth. This is because light travels at a speed of about 299,792,458 kilometers per second, and the average distance between the Sun and Earth is about 149.6 million kilometers. By dividing the distance by the speed, we can calculate that it takes light roughly 500 seconds, or 8 minutes and 20 seconds, to reach Earth from the Sun.

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  • 9. 
    What are animals called that only consume other animals? - ProProfs

    What are animals called that only consume other animals?

    • Omnivores

    • Herbivores

    • Carnivores

    • None of these

    Correct Answer
    A. Carnivores
    Explanation
    Carnivores are animals that only consume other animals for their diet. They are typically at the top of the food chain as secondary consumers. Carnivores often have specialized adaptations, such as sharp teeth and claws, to hunt and kill their prey. Unlike herbivores, which only consume plants, and omnivores, which consume both plants and animals, carnivores rely solely on animal meat for their nutritional needs

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  • 10. 
    What type of animal is a shark? - ProProfs

    What type of animal is a shark?

    • Mammal

    • Bird

    • Fish

    • Reptile

    Correct Answer
    A. Fish
    Explanation
    Sharks are a type of fish, characterized by their cartilaginous skeletons, five to seven gill slits on the sides of their heads, and pectoral fins that are not fused to the head. Known for their keen senses and predatory efficiency, sharks are an essential part of marine ecosystems and vary widely in size and shape. Some species, such as the great white shark, are apex predators, while others, like the whale shark, feed primarily on plankton. Despite their fearsome reputation, sharks are not a significant threat to humans and play a crucial role in maintaining the health of ocean ecosystems.

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  • 11. 
    Which star is the closest to planet Earth? - ProProfs

    Which star is the closest to planet Earth?

    • Proxima Centauri

    • Sirius

    • Alpha Centauri

    • The Sun

    Correct Answer
    A. The Sun
    Explanation
    The Sun is the closest star to planet Earth, located approximately 93 million miles away. It is the center of our solar system and by far the most dominant source of energy for life on Earth. While other stars like Proxima Centauri and Sirius are significantly farther away, the Sun's proximity plays a crucial role in Earth's climate and ecosystem, making it the most influential star for our planet.

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  • 12. 
    What is the most abundant gas in the Earth's atmosphere? - ProProfs

    What is the most abundant gas in the Earth's atmosphere?

    • Oxygen

    • Hydrogen

    • Carbon Dioxide

    • Nitrogen

    Correct Answer
    A. Nitrogen
    Explanation
    Nitrogen makes up about 78% of the Earth's atmosphere, more than any other gas. Oxygen, the second most abundant, constitutes about 21%. This composition plays a crucial role in the sustainability of life on Earth, as nitrogen is essential for the synthesis of amino acids, which are the building blocks of proteins. Additionally, nitrogen is also a key component in the growth of plants, making it vital for agriculture and food production. Without nitrogen, the balance of ecosystems and food chains would be significantly disrupted.

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  • 13. 
    What group of stars is the sun classified in? - ProProfs

    What group of stars is the sun classified in?

    • Supernova

    • Hypernova 

    • Yellow Dwarf

    • Red Supergiant

    Correct Answer
    A. Yellow Dwarf
    Explanation
    The Sun is classified as a G-type main-sequence star, also known as a yellow dwarf. This classification is based on its size, temperature, and luminosity. Yellow dwarfs are relatively small and have a surface temperature of around 5,500 degrees Celsius. They are the most common type of star in the Milky Way galaxy. Yellow dwarfs like the Sun typically have a lifespan of about 10 billion years, with our Sun currently being around 4.6 billion years old. Despite their commonality, yellow dwarfs are still fascinating objects of study for astronomers due to their unique characteristics and potential impact on planetary systems.

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  • 14. 
    - ProProfs

    • Fusion

    • Sublimation

    • Deposition

    • Condensation

    Correct Answer
    A. Sublimation
    Explanation
    Sublimation is the phase transition in which a solid turns directly into a gas without first becoming a liquid. This process is observed under certain temperature and pressure conditions and is exemplified by dry ice, which is solid carbon dioxide that sublimates into carbon dioxide gas. Sublimation is a useful concept in various scientific fields, including meteorology, physics, and manufacturing.

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  • 15. 
    Choose all the planets that are gas giants: (select all that apply) - ProProfs

    Choose all the planets that are gas giants: (select all that apply)

    • Uranus

    • Neptune

    • Mars

    • Jupiter 

    • Venus

    • Saturn

    Correct Answer(s)
    A. Uranus
    A. Neptune
    A. Jupiter 
    A. Saturn
    Explanation
    Jupiter, Saturn, Uranus, and Neptune are gas giants characterized by their massive size and predominantly gaseous composition. These planets lack solid surfaces and are primarily composed of hydrogen and helium, with traces of other gases. Their immense gravitational pull compresses the gases into dense atmospheres surrounding small, rocky cores. Unlike terrestrial planets such as Mars and Venus, gas giants have extensive atmospheres and lack well-defined surfaces.

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Daniel P |MSEd (Science Education) |
Science Teacher
Daniel P. is an experienced STEM club teacher with 11 years of urban teaching experience. He holds a MSEd in Science Education from The City College of New York and a BA in History from Binghamton University. He is committed to enhancing student education, using his expertise in curriculum design, differentiated instruction, and Google Classroom.

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  • Feb 28, 2025
    Quiz Edited by
    ProProfs Editorial Team

    Expert Reviewed by
    Daniel P
  • May 11, 2012
    Quiz Created by
    Saumik

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