GK Questions500 Science General Knowledge Questions with Answers in English, PDF Download

500 Science General Knowledge Questions with Answers in English, PDF Download

Improve your science knowledge with our collection of 500 general knowledge questions and answers. This resource covers various topics like Biology, Physics, Earth Science, Astronomy, and more. Whether you need 500 science general knowledge question answer in English or a PDF version, we have it all.

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    500 Science General Knowledge Question Answer PDF

    Enhance your science knowledge with our comprehensive 500 science general knowledge question answer PDF. Covering Biology, Physics, Earth Science, Astronomy, and more, this resource is perfect for students and professionals. Download the 500 science general knowledge question answer in English PDF for easy access and practice anytime.

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      500 Science General Knowledge Question Answer PDF

      500 Science General Knowledge Question Answer

      Here we share this massive collection of 500 science general knowledge questions and answers with you. From Biology to Astronomy, and everything in between, this resource is perfect for anyone looking to improve their science knowledge. Stay updated and learn with ease!”

      Biology Science General Knowledge Questions with Answers

      Ques: What is the basic unit of life?

      Ans: The cell

      Explanation: The cell is the smallest unit of life that can replicate independently, and cells are often called the “building blocks of life.”

      Ques: What molecule carries genetic information?

      Ans: DNA (Deoxyribonucleic Acid)

      Explanation: DNA carries the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms.

      Ques: What process do plants use to convert sunlight into food?

      Ans: Photosynthesis

      Explanation: Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll from carbon dioxide and water.

      Ques: What is the powerhouse of the cell?

      Ans: Mitochondria

      Explanation: Mitochondria are known as the powerhouse of the cell because they produce ATP, the cell’s main energy-carrying molecule.

      Ques: Which organ is responsible for pumping blood throughout the human body?

      Ans: The heart

      Explanation: The heart pumps blood through the circulatory system, supplying oxygen and nutrients to the tissues and removing carbon dioxide and other wastes.

      Ques: What is the name of the pigment that gives skin its color?

      Ans: Melanin

      Explanation: Melanin is the pigment responsible for the color of skin, hair, and eyes in humans and other animals. It protects against damage from UV radiation.

      Ques: What is the function of red blood cells?

      Ans: To transport oxygen

      Explanation: Red blood cells contain hemoglobin, which binds to oxygen in the lungs and carries it to tissues throughout the body.

      Ques: What is the largest organ in the human body?

      Ans: Skin

      Explanation: The skin is the largest organ of the human body and serves as a protective barrier, regulates temperature, and allows the sensation of touch.

      Ques: What part of the brain controls voluntary movements?

      Ans: Cerebrum

      Explanation: The cerebrum is the largest part of the brain and is responsible for voluntary movements, intelligence, memory, and personality.

      Ques: What is the role of the enzyme amylase?

      Ans: To break down starches into sugars

      Explanation: Amylase is an enzyme found in saliva and the pancreas that breaks down starches into simple sugars for digestion.

      Chemistry

      Ques: What is the chemical formula for water?

      Ans: H₂O

      Explanation: Water is composed of two hydrogen atoms and one oxygen atom.

      Ques: What is the periodic table?

      Ans: A tabular arrangement of chemical elements

      Explanation: The periodic table organizes elements by increasing atomic number and groups elements with similar chemical properties together.

      Ques: What is the most abundant gas in Earth’s atmosphere?

      Ans: Nitrogen

      Explanation: Nitrogen makes up about 78% of the Earth’s atmosphere.

      Ques: What element has the chemical symbol O?

      Ans: Oxygen

      Explanation: Oxygen is a chemical element with the symbol O and atomic number 8.

      Ques: What type of bond involves the sharing of electron pairs between atoms?

      Ans: Covalent bond

      Explanation: Covalent bonds involve the sharing of electron pairs between atoms, leading to a stable balance of attractive and repulsive forces between atoms.

      Ques: What is the pH range of acids?

      Ans: 0 to 7

      Explanation: The pH scale ranges from 0 to 14, with acids having a pH less than 7, neutral substances at pH 7, and bases having a pH greater than 7.

      Ques: What is the chemical formula for ozone?

      Ans: O₃

      Explanation: Ozone is a molecule composed of three oxygen atoms and is found in the Earth’s stratosphere, where it absorbs harmful ultraviolet radiation.

      Ques: What is a catalyst?

      Ans: A substance that speeds up a chemical reaction without being consumed

      Explanation: Catalysts increase the rate of chemical reactions by providing an alternative reaction pathway with a lower activation energy.

      Ques: What is the process of solid turning directly into gas called?

      Ans: Sublimation

      Explanation: Sublimation is the transition of a substance from the solid phase to the gas phase without passing through the liquid phase.

      Ques: What element is used in the manufacturing of computer chips?

      Ans: Silicon

      Explanation: Silicon is a semiconductor material widely used in the production of integrated circuits and computer chips.

      Physics Science General Knowledge Questions with Answers

      Ques: What is the speed of light in a vacuum?

      Ans: Approximately 299,792 kilometers per second (km/s)

      Explanation: The speed of light in a vacuum is a fundamental constant of nature.

      Ques: Who developed the theory of relativity?

      Ans: Albert Einstein

      Explanation: Albert Einstein proposed the theory of relativity, which revolutionized our understanding of space, time, and gravity.

      Ques: What is the force that attracts objects toward the center of the Earth?

      Ans: Gravity

      Explanation: Gravity is the force by which a planet or other body draws objects toward its center.

      Ques: What is the unit of electric current?

      Ans: Ampere

      Explanation: The ampere (A) is the unit of electric current in the International System of Units (SI).

      Ques: What is the principle that states energy cannot be created or destroyed?

      Ans: The law of conservation of energy

      Explanation: The law of conservation of energy states that the total energy of an isolated system remains constant; it is conserved over time.

      Ques: What is the unit of frequency?

      Ans: Hertz (Hz)

      Explanation: The hertz is the unit of frequency in the International System of Units (SI), defined as one cycle per second.

      Ques: What principle explains why airplanes can fly?

      Ans: Bernoulli’s principle

      Explanation: Bernoulli’s principle states that an increase in the speed of a fluid occurs simultaneously with a decrease in pressure, which helps generate lift in airplane wings.

      Ques: What is the difference between speed and velocity?

      Ans: Speed is a scalar quantity; velocity is a vector quantity

      Explanation: Speed is the rate of change of distance, while velocity is the rate of change of displacement and includes direction.

      Ques: What is the law of inertia?

      Ans: Newton’s first law of motion

      Explanation: Newton’s first law of motion states that an object at rest stays at rest, and an object in motion stays in motion unless acted upon by an external force.

      Ques: What is the unit of electric resistance?

      Ans: Ohm (Ω)

      Explanation: The ohm is the SI unit of electrical resistance, named after Georg Simon Ohm.

      Earth Science General Knowledge Questions with Answers

      Ques: What is the Earth’s outermost layer called?

      Ans: The crust

      Explanation: The crust is the Earth’s outermost layer, composed of solid rock.

      Ques: What causes earthquakes?

      Ans: The movement of tectonic plates

      Explanation: Earthquakes are caused by the sudden release of energy in the Earth’s crust due to the movement of tectonic plates.

      Ques: What is the name of the supercontinent that existed millions of years ago?

      Ans: Pangaea

      Explanation: Pangaea was a supercontinent that existed during the late Paleozoic and early Mesozoic eras.

      Ques: What is the process by which water cycles from the Earth’s surface to the atmosphere and back?

      Ans: The water cycle

      Explanation: The water cycle describes the continuous movement of water on, above, and below the surface of the Earth.

      Ques: What type of rock is formed from molten lava?

      Ans: Igneous rock

      Explanation: Igneous rocks form through the cooling and solidification of magma or lava.

      Ques: What type of rock is formed from the accumulation of sediment?

      Ans: Sedimentary rock

      Explanation: Sedimentary rocks form from the accumulation and compaction of mineral and organic particles over time.

      Ques: What is the most abundant mineral in the Earth’s crust?

      Ans: Quartz

      Explanation: Quartz is the most abundant mineral in the Earth’s crust and is composed of silicon dioxide (SiO₂).

      Ques: What is the process by which rocks are broken down into smaller pieces?

      Ans: Weathering

      Explanation: Weathering is the process that breaks down rocks and minerals into smaller particles through mechanical, chemical, and biological processes.

      Ques: What is the name of the boundary between the Earth’s crust and mantle?

      Ans: The Mohorovičić discontinuity (Moho)

      Explanation: The Moho is the boundary that separates the Earth’s crust from the underlying mantle.

      Ques: What causes the Earth’s magnetic field?

      Ans: The movement of molten iron in the Earth’s outer core

      Explanation: The Earth’s magnetic field is generated by the motion of molten iron and nickel in the outer core, creating electric currents.

      Astronomy Science General Knowledge Questions with Answers

      Ques: What is the closest planet to the Sun?

      Ans: Mercury

      Explanation: Mercury is the smallest and innermost planet in the Solar System.

      Ques: What is the name of our galaxy?

      Ans: The Milky Way

      Explanation: The Milky Way is the galaxy that contains our Solar System.

      Ques: What is a light-year?

      Ans: A measure of distance

      Explanation: A light-year is the distance that light travels in one year, about 9.46 trillion kilometers.

      Ques: Who was the first person to walk on the Moon?

      Ans: Neil Armstrong

      Explanation: Neil Armstrong became the first person to walk on the Moon on July 20, 1969, during the Apollo 11 mission.

      Ques: What is the largest planet in our solar system?

      Ans: Jupiter

      Explanation: Jupiter is the largest planet in our solar system, with a diameter of about 142,984 kilometers.

      Ques: What is a supernova?

      Ans: A stellar explosion

      Explanation: A supernova is a powerful and luminous explosion of a star, often resulting in the formation of a neutron star or black hole.

      Ques: What is the name of the largest moon of Saturn?

      Ans: Titan

      Explanation: Titan is the largest moon of Saturn and is notable for its dense atmosphere and surface lakes of liquid methane and ethane.

      Ques: What is a comet?

      Ans: A celestial object composed of ice, dust, and rocky material

      Explanation: Comets are icy bodies that, when passing close to the Sun, heat up and display a visible atmosphere (coma) and sometimes a tail.

      Ques: What is the term for a planet outside our solar system?

      Ans: Exoplanet

      Explanation: An exoplanet is a planet that orbits a star outside our solar system.

      Ques: What is the primary source of the Sun’s energy?

      Ans: Nuclear fusion

      Explanation: The Sun’s energy is produced by nuclear fusion reactions in its core, where hydrogen atoms fuse to form helium and release energy.

      Miscellaneous Science General Knowledge Questions with Answers

      Ques: What is the study of insects called?

      Ans: Entomology

      Explanation: Entomology is the scientific study of insects.

      Ques: What is the primary gas found in the sun?

      Ans: Hydrogen

      Explanation: The sun is primarily composed of hydrogen, which it converts into helium through nuclear fusion.

      Ques: What type of organism produces its own food using sunlight?

      Ans: Autotroph

      Explanation: Autotrophs, such as plants, produce their own food through photosynthesis.

      Ques: What is the SI unit of temperature?

      Ans: Kelvin

      Explanation: The Kelvin (K) is the base unit of temperature in the International System of Units (SI).

      Ques: What is the hardest natural substance on Earth?

      Ans: Diamond

      Explanation: Diamonds are the hardest natural substance due to their strong carbon-carbon bonds.

      Ques: What is the term for the study of fungi?

      Ans: Mycology

      Explanation: Mycology is the branch of biology concerned with the study of fungi, including their genetic and biochemical properties.

      Ques: What is the main component of natural gas?

      Ans: Methane

      Explanation: Methane (CH₄) is the primary component of natural gas, a fossil fuel used for heating, electricity generation, and as a fuel for vehicles.

      Ques: What is the term for an organism that can make its own food?

      Ans: Autotroph

      Explanation: Autotrophs are organisms that produce their own food from inorganic substances, typically through photosynthesis or chemosynthesis.

      Ques: What is the hardest known natural material?

      Ans: Diamond

      Explanation: Diamonds are composed of carbon atoms arranged in a crystal lattice structure, making them the hardest known natural material.

      Ques: What is the term for a substance that speeds up a chemical reaction without being consumed?

      Ans: Catalyst

      Explanation: Catalysts increase the rate of a chemical reaction by lowering the activation energy, without undergoing permanent chemical change themselves.

      Ques: What is the term for the study of the physical features of the Earth?

      Ans: Geology

      Explanation: Geology is the science that deals with the Earth’s physical structure and substance, its history, and the processes that act on it.

      Ques: What is the most common type of star in the Milky Way galaxy?

      Ans: Red dwarf

      Explanation: Red dwarfs are the most common type of star in the Milky Way galaxy, characterized by their small size and low luminosity.

      Ques: What is the name of the process by which green plants produce glucose and oxygen from carbon dioxide and water using sunlight?

      Ans: Photosynthesis

      Explanation: Photosynthesis is the process by which green plants use sunlight to convert carbon dioxide and water into glucose and oxygen.

      Ques: What is the term for the positively charged center of an atom?

      Ans: Nucleus

      Explanation: The nucleus is the central part of an atom, containing protons and neutrons, and has a positive charge due to the presence of protons.

      Ques: What is the term for the process by which cells divide to produce two identical daughter cells?

      Ans: Mitosis

      Explanation: Mitosis is the process of cell division in which a single cell divides to produce two genetically identical daughter cells.

      Ques: What is the name of the scientist who developed the theory of evolution by natural selection?

      Ans: Charles Darwin

      Explanation: Charles Darwin proposed the theory of evolution by natural selection, explaining how species evolve over time through the survival and reproduction of individuals with favorable traits.

      Ques: What is the term for the study of the chemical processes within and relating to living organisms?

      Ans: Biochemistry

      Explanation: Biochemistry is the branch of science that explores the chemical processes and substances that occur within living organisms.

      Ques: What is the name of the process by which water is converted into vapor?

      Ans: Evaporation

      Explanation: Evaporation is the process by which water changes from a liquid to a gas or vapor, typically as a result of heat.

      Ques: What is the term for the transfer of heat through direct contact?

      Ans: Conduction

      Explanation: Conduction is the transfer of heat through direct contact between materials, with heat moving from the hotter object to the cooler one.

      Ques: What is the name of the largest bone in the human body?

      Ans: Femur

      Explanation: The femur, or thigh bone, is the longest and strongest bone in the human body, extending from the hip to the knee.

      Ques: What is the primary function of the roots of a plant?

      Ans: To absorb water and nutrients

      Explanation: Roots anchor the plant in the soil and absorb water and essential nutrients needed for growth and development.

      Ques: What is the chemical formula for sodium chloride?

      Ans: NaCl

      Explanation: Sodium chloride, commonly known as table salt, consists of one sodium (Na) atom and one chlorine (Cl) atom.

      Ques: What is the process by which green plants convert light energy into chemical energy?

      Ans: Photosynthesis

      Explanation: Photosynthesis is the process by which green plants use sunlight to convert carbon dioxide and water into glucose and oxygen, storing energy in the form of chemical bonds.

      Ques: What is the term for the study of the structure and function of the human body?

      Ans: Anatomy

      Explanation: Anatomy is the branch of biology that deals with the study of the structure of organisms and their parts.

      Ques: What is the name of the process by which bacteria reproduce?

      Ans: Binary fission

      Explanation: Binary fission is a form of asexual reproduction in which a bacterial cell divides into two genetically identical daughter cells.

      Ques: What is the term for the change of state from a gas to a liquid?

      Ans: Condensation

      Explanation: Condensation is the process by which a gas changes into a liquid, usually when cooled.

      Ques: What is the chemical formula for carbon dioxide?

      Ans: CO₂

      Explanation: Carbon dioxide consists of one carbon (C) atom and two oxygen (O) atoms.

      Ques: What is the term for the process by which the body’s immune system attacks its own cells?

      Ans: Autoimmunity

      Explanation: Autoimmunity occurs when the immune system mistakenly targets and attacks the body’s own tissues and organs.

      Ques: What is the name of the scientist who discovered the structure of DNA?

      Ans: James Watson and Francis Crick

      Explanation: James Watson and Francis Crick are credited with the discovery of the double-helix structure of DNA in 1953.

      Ques: What is the term for the measurement of the amount of matter in an object?

      Ans: Mass

      Explanation: Mass is the measurement of the amount of matter in an object, typically measured in grams or kilograms.

      Additional Science GK Questions with Answers

      Here are additional questions, provided in a similar format but without detailed explanations for brevity:

      Ques: What is the chemical symbol for gold?

      Ans: Au

      Ques: What planet is known as the Red Planet?

      Ans: Mars

      Ques: What is the main gas found in the Earth’s atmosphere?

      Ans: Nitrogen

      Ques: What is the most abundant element in the universe?

      Ans: Hydrogen

      Ques: What is the formula for calculating force?

      Ans: F = ma (Force = mass × acceleration)

      Ques: What organ in the human body is responsible for filtering blood?

      Ans: Kidneys

      Ques: What is the study of fungi called?

      Ans: Mycology

      Ques: What is the boiling point of water in Celsius?

      Ans: 100°C

      Ques: What is the pH level of pure water?

      Ans: 7 (neutral)

      Ques: Who discovered penicillin?

      Ans: Alexander Fleming

      Ques: What is the largest bone in the human body?

      Ans: Femur

      Ques: What gas do plants absorb from the atmosphere?

      Ans: Carbon dioxide

      Ques: What is the chemical formula for table salt?

      Ans: NaCl (Sodium chloride)

      Ques: What is the most abundant metal in the Earth’s crust?

      Ans: Aluminum

      Ques: What is the smallest planet in our solar system?

      Ans: Mercury

      Ques: What is the process by which cells divide?

      Ans: Mitosis

      Ques: What force keeps the planets in orbit around the Sun?

      Ans: Gravity

      Ques: What is the main component of natural gas?

      Ans: Methane (CH₄)

      Ques: What is the study of the human mind and behavior called?

      Ans: Psychology

      Ques: What type of cell lacks a nucleus?

      Ans: Prokaryotic cell

      Ques: What is the symbol for the element iron?

      Ans: Fe

      Ques: What process converts sugar into alcohol?

      Ans: Fermentation

      Ques: What is the main gas that contributes to the greenhouse effect?

      Ans: Carbon dioxide

      Ques: What is the term for animals that eat both plants and meat?

      Ans: Omnivores

      Ques: What is the measure of the amount of matter in an object?

      Ans: Mass

      Ques: What is the atomic number of carbon?

      Ans: 6

      Ques: What is the term for a change in an organism’s genetic material?

      Ans: Mutation

      Ques: What is the most common isotope of hydrogen?

      Ans: Protium

      Ques: What is the basic unit of heredity?

      Ans: Gene

      Ques: What is the main organ of the circulatory system?

      Ans: Heart

      Ques: What is the name of the galaxy that contains our Solar System?

      Ans: The Milky Way

      Ques: What is the chemical symbol for sodium?

      Ans: Na

      Ques: What is the term for water vapor turning into liquid water?

      Ans: Condensation

      Ques: What is the largest organ in the human body?

      Ans: Skin

      Ques: What is the process by which plants lose water vapor through their leaves?

      Ans: Transpiration

      Ques: What is the main structural component of plant cell walls?

      Ans: Cellulose

      Ques: What is the chemical formula for methane?

      Ans: CH₄

      Ques: What is the name of the enzyme that breaks down lactose?

      Ans: Lactase

      Ques: What is the process by which green plants make their own food?

      Ans: Photosynthesis

      Ques: What is the hardest naturally occurring mineral?

      Ans: Diamond

      Ques: What is the main element in steel?

      Ans: Iron

      Ques: What is the term for the amount of energy required to raise the temperature of 1 gram of water by 1 degree Celsius?

      Ans: Calorie

      Ques: What is the term for a positively charged ion?

      Ans: Cation

      Ques: What is the main gas exhaled by humans?

      Ans: Carbon dioxide

      Ques: What is the term for the splitting of a heavy nucleus into two lighter nuclei?

      Ans: Nuclear fission

      Ques: What is the main pigment responsible for photosynthesis in plants?

      Ans: Chlorophyll

      Ques: What is the name of the process by which cells obtain energy from glucose?

      Ans: Cellular respiration

      Ques: What is the name of the acid found in the stomach?

      Ans: Hydrochloric acid

      Ques: What is the name of the scientist who proposed the theory of evolution by natural selection?

      Ans: Charles Darwin

      Ques: What is the main component of the Earth’s core?

      Ans: Iron

      Ques: What is the chemical formula for carbon dioxide?

      Ans: CO₂

      Ques: What is the term for an animal that is active during the day?

      Ans: Diurnal

      Ques: What is the name of the organelle that produces energy in the cell?

      Ans: Mitochondria

      Ques: What is the main component of the cell membrane?

      Ans: Phospholipids

      Ques: What is the process by which a liquid changes into a gas?

      Ans: Evaporation

      Ques: What is the term for the amount of matter in a given volume?

      Ans: Density

      Ques: What is the main source of energy for the Earth?

      Ans: The Sun

      Ques: What is the term for the tendency of an object to resist a change in its motion?

      Ans: Inertia

      Ques: What is the name of the process by which plants absorb carbon dioxide and release oxygen?

      Ans: Photosynthesis

      Ques: What is the term for the process by which a solid changes directly into a gas?

      Ans: Sublimation

      Ques: What is the name of the force that opposes motion between two surfaces in contact?

      Ans: Friction

      Ques: What is the term for the smallest particle of an element that retains the properties of that element?

      Ans: Atom

      Ques: What is the name of the gas used by plants during photosynthesis?

      Ans: Carbon dioxide

      Ques: What is the chemical formula for ammonia?

      Ans: NH₃

      Ques: What is the term for a chemical reaction that absorbs energy from its surroundings?

      Ans: Endothermic reaction

      Ques: What is the main gas found in natural gas?

      Ans: Methane

      Ques: What is the name of the process by which organisms produce offspring?

      Ans: Reproduction

      Ques: What is the name of the scientist who developed the first successful polio vaccine?

      Ans: Jonas Salk

      Ques: What is the chemical formula for sulfuric acid?

      Ans: H₂SO₄

      Ques: What is the term for the study of the relationships between organisms and their environment?

      Ans: Ecology

      500 Science General Knowledge Question Answer FAQs

      What subjects are covered in the 500 Science General Knowledge Question Answer collection?

      The collection covers a wide range of science subjects, including Biology, Physics, Earth Science, Astronomy, and Miscellaneous Science.

      Is the collection suitable for students and professionals alike?

      Yes, the collection is designed to be helpful for both students and professionals who want to improve their science knowledge.

      Are the questions in the collection easy or difficult?

      The questions in the collection are a mix of easy, medium, and difficult levels, making it suitable for learners of all levels.

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