Science is a systematic and evidence-based pursuit of knowledge about the natural world. It encompasses various disciplines, including physics, chemistry, biology, astronomy, and more. Science relies on observation, experimentation, and analysis to understand the underlying principles governing the universe.

In physics, scientists study the fundamental forces and particles that make up matter and energy, exploring topics such as quantum mechanics and relativity. Chemistry focuses on the properties, composition, and behavior of substances, investigating elements, compounds, and chemical reactions. Biology delves into the study of living organisms, including their structure, function, evolution, and interactions.

Astronomy explores celestial objects, such as stars, planets, galaxies, and the universe as a whole. It investigates the origins and evolution of these objects and the laws governing their motion.

Scientific discoveries and technological advancements have shaped our understanding of the world and revolutionized various fields. They have led to breakthroughs in medicine, agriculture, communication, transportation, and energy production, among others.

In this article

• Part 1: 30 science knowledge quiz questions & answers
• Part 2: Download science knowledge questions & answers for free
• Part 3: Free online quiz creator – OnlineExamMaker

Part 1: 30 multiple-choice science knowledge quiz questions along with their corresponding answers

1. Which of the following is not a fundamental force in nature?
a) Gravity
b) Electromagnetism
c) Weak nuclear force
d) Atomic force
Answer: d) Atomic force

2. Which scientist proposed the theory of general relativity?
a) Isaac Newton
b) Albert Einstein
c) Galileo Galilei
d) Nikola Tesla
Answer: b) Albert Einstein

3. What is the smallest unit of matter?
a) Atom
b) Molecule
c) Proton
d) Electron
Answer: a) Atom

4. Which gas is most abundant in Earth’s atmosphere?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Hydrogen
Answer: c) Nitrogen

5. What is the process by which plants convert sunlight into energy called?
a) Photosynthesis
b) Respiration
c) Transpiration
d) Reproduction
Answer: a) Photosynthesis

6. What is the study of heredity and variation in organisms called?
a) Ecology
b) Genetics
c) Evolution
d) Microbiology
Answer: b) Genetics

7. Which planet is known as the “Red Planet”?
a) Venus
b) Mars
c) Jupiter
d) Saturn
Answer: b) Mars

8. Which element has the atomic number 6?
a) Carbon
b) Oxygen
c) Hydrogen
d) Nitrogen
Answer: a) Carbon

9. What is the chemical symbol for gold?
a) Ag
b) Au
c) Hg
d) Fe
Answer: b) Au

10. What is the largest planet in our solar system?
a) Earth
b) Jupiter
c) Saturn
d) Uranus
Answer: b) Jupiter

11. What is the study of the Earth’s atmosphere called?
a) Geology
b) Meteorology
c) Oceanography
d) Botany
Answer: b) Meteorology

12. Which type of rock is formed from the cooling and solidification of magma or lava?
a) Sedimentary rock
b) Metamorphic rock
c) Igneous rock
d) Fossil rock
Answer: c) Igneous rock

13. What is the basic unit of life?
a) Cell
b) Tissue
c) Organ
d) Organism
Answer: a) Cell

14. What is the speed of light in a vacuum?
a) 300,000 meters per second
b) 150,000 meters per second
c) 3,000,000 meters per second
d) 30,000,000 meters per second
Answer: a) 300,000 meters per second

15. Which scientist is known for the theory of evolution by natural selection?
a) Charles Darwin
b) Gregor Mendel
c) Louis Pasteur
d) Alexander Fleming
Answer: a) Charles Darwin

Part 2: Download science knowledge questions & answers for free

16. What is the SI unit of electric current?
a) Watt
b) Volt
c) Ampere
d) Ohm
Answer: c) Ampere

17. Which organ in the human body produces insulin?
a) Liver
b) Pancreas
c) Kidney
d) Stomach
Answer: b) Pancreas

18. What is the chemical formula for water?
a) H2O2
b) CO2
c) H2SO4
d) H2O
Answer: d) H2O

19. What is the study of the Earth’s physical structure and composition called?
a) Geography
b) Geology
c) Anthropology
d) Sociology
Answer: b) Geology

20. Which type of electromagnetic radiation has the shortest wavelength?
a) Radio waves
b) Microwaves
c) X-rays
d) Gamma rays
Answer: d) Gamma rays

21. Which scientist is credited with the discovery of the laws of motion?
a) Isaac Newton
b) Galileo Galilei
c) Nikola Tesla
d) Albert Einstein
Answer: a) Isaac Newton

22. What is the chemical symbol for iron?
a) Fe
b) Ag
c) Cu
d) Pb
Answer: a) Fe

23. Which process converts a solid directly into a gas without going through the liquid phase?
a) Sublimation
b) Condensation
c) Evaporation
d) Freezing
Answer: a) Sublimation

24. What is the largest organ in the human body?
a) Heart
b) Liver
c) Brain
d) Skin
Answer: d) Skin

25. Which planet is known for its beautiful rings?
a) Earth
b) Mars
c) Jupiter
d) Saturn
Answer: d) Saturn

26. What is the study of the behavior and properties of light called?
a) Optics
b) Thermodynamics
c) Electrodynamics
d) Kinematics
Answer: a) Optics

27. Which gas is responsible for the green color of plants?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Chlorophyll
Answer: d) Chlorophyll

28. Which scientist is known for the theory of general relativity?
a) Isaac Newton
b) Albert Einstein
c) Galileo Galilei
d) Nikola Tesla
Answer: b) Albert Einstein

29. What is the study of the Earth’s oceans called?
a) Geology
b) Meteorology
c) Oceanography
d) Botany
Answer: c) Oceanography

30. Which type of energy is stored in the nucleus of an atom?
a) Kinetic energy
b) Potential energy
c) Thermal energy
d) Nuclear energy
Answer: d) Nuclear energy

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