- 1. Natural sciences encompass scientific fields that study the physical, natural world and its phenomena. These disciplines include biology, chemistry, physics, earth sciences, and astronomy, among others. Natural sciences seek to understand and explain various aspects of nature, from the behavior of organisms to the dynamics of the universe. Scientists in these fields use systematic observation, experimentation, and analysis to uncover the fundamental principles governing the natural world, driving advancements in technology, medicine, and our understanding of the world around us.
What is the atomic number of carbon?
A) 8
B) 6
C) 14
D) 12
- 2. Which of the following is considered a greenhouse gas?
A) Nitrogen
B) Argon
C) Carbon dioxide
D) Oxygen
- 3. What is the process by which plants make their own food?
A) Decomposition
B) Photosynthesis
C) Fermentation
D) Respiration
- 4. What is the largest organ of the human body?
A) Heart
B) Skin
C) Lungs
D) Liver
- 5. What is the unit of measurement for force?
A) Joule
B) Newton
C) Watt
D) Volt
- 6. What is the densest element on the periodic table?
A) Gold
B) Platinum
C) Osmium
D) Lead
- 7. What is the Earth's outermost layer called?
A) Crust
B) Atmosphere
C) Mantle
D) Core
- 8. What is the main function of red blood cells?
A) Fight infection
B) Produce antibodies
C) Transport oxygen
D) Clot blood
- 9. What is the chemical symbol for gold?
A) Fe
B) Au
C) Cu
D) Ag
- 10. What type of energy does food provide to the body?
A) Chemical energy
B) Electric energy
C) Solar energy
D) Nuclear energy
- 11. Which planet is known as the 'Red Planet'?
A) Saturn
B) Mars
C) Venus
D) Jupiter
- 12. What is the hardest natural mineral on Earth?
A) Quartz
B) Topaz
C) Emerald
D) Diamond
- 13. Which layer of the atmosphere contains the ozone layer?
A) Troposphere
B) Mesosphere
C) Thermosphere
D) Stratosphere
- 14. What is the SI unit for measuring electric current?
A) Ohm
B) Ampere
C) Volt
D) Watt
- 15. What is the state of matter with a definite shape and volume?
A) Liquid
B) Plasma
C) Solid
D) Gas
- 16. What type of seismic wave travels the fastest?
A) Rayleigh wave
B) Primary wave (P-wave)
C) Surface wave
D) Secondary wave (S-wave)
- 17. Which of the following is not a component of the cardiovascular system?
A) Lungs
B) Blood vessels
C) Blood
D) Heart
- 18. What is the study of the Earth's physical structure and substance called?
A) Meteorology
B) Zoology
C) Botany
D) Geology
- 19. What is the main component of natural gas?
A) Ethylene
B) Methane
C) Propane
D) Butane
- 20. What process releases energy from food in living organisms?
A) Digestion
B) Fermentation
C) Photosynthesis
D) Respiration
- 21. Which of the following is a unit of pressure?
A) Newton
B) Pascal
C) Joule
D) Watt
- 22. What term is used for the ability of an object to float in a liquid?
A) Gravity
B) Density
C) Buoyancy
D) Inertia
- 23. Which branch of science studies the Earth's atmosphere?
A) Geology
B) Botany
C) Meteorology
D) Astronomy
- 24. What part of the plant is responsible for absorbing water and nutrients?
A) Roots
B) Leaves
C) Flower
D) Stem
- 25. Which process powers the Sun?
A) Radioactive decay
B) Combustion
C) Nuclear fission
D) Nuclear fusion
- 26. Which of the following is a vector quantity?
A) Energy
B) Velocity
C) Temperature
D) Mass
- 27. What is the largest planet in our solar system?
A) Mars
B) Saturn
C) Jupiter
D) Venus
- 28. What is the powerhouse of the cell?
A) Ribosome
B) Golgi apparatus
C) Mitochondria
D) Nucleus
- 29. What is the chemical symbol for Sodium?
A) So
B) Na
C) No
D) S
- 30. What is the branch of science that deals with the interaction of energy and matter?
A) Physics
B) Biology
C) Geology
D) Chemistry
- 31. Who proposed the theory of evolution by natural selection?
A) Gregor Mendel
B) Louis Pasteur
C) Marie Curie
D) Charles Darwin
- 32. What is the hard outer layer of bones called?
A) Cortex
B) Periosteum
C) Marrow
D) Cartilage
- 33. Which is the hottest planet in our solar system?
A) Venus
B) Earth
C) Mercury
D) Mars
- 34. What is the process by which rocks are broken down into smaller pieces by physical or chemical means?
A) Erosion
B) Deposition
C) Weathering
D) Volcanism
- 35. What is the process by which plants release water vapor into the atmosphere?
A) Respiration
B) Photosynthesis
C) Transpiration
D) Mitosis
- 36. Which subatomic particle has a positive charge?
A) Proton
B) Electron
C) Photon
D) Neutron
- 37. What is the unit of measurement for electrical resistance?
A) Ampere
B) Volt
C) Watt
D) Ohm
- 38. What is the total number of chromosomes in a human body cell?
A) 46
B) 23
C) So many
D) 60
- 39. Which particle is negatively charged?
A) Proton
B) Neutron
C) Photon
D) Electron
- 40. What is the measure of the acidity or alkalinity of a solution?
A) HVAC
B) pH
C) CFM
D) UV
- 41. What is the force that opposes the motion of objects through a fluid like air or water?
A) Friction
B) Tension
C) Gravity
D) Drag
- 42. Which type of rock is formed by the cooling of magma or lava?
A) Metamorphic
B) Sedimentary
C) Igneous
D) Volcanic
- 43. Which of these is the smallest unit of matter?
A) Cell
B) Molecule
C) Atom
D) Proton
- 44. What is the process by which liquid water becomes water vapor?
A) Condensation
B) Evaporation
C) Precipitation
D) Transpiration
- 45. What is the only metal that is liquid at room temperature?
A) Lead
B) Aluminum
C) Mercury
D) Copper
- 46. What force keeps objects in orbit around the Earth?
A) Friction
B) Magnetism
C) Heat
D) Gravity
- 47. What is the chemical formula for water?
A) CO2
B) H2O
C) N2
D) NaCl
- 48. What is the name for the process of a liquid turning into a solid?
A) Melting
B) Condensation
C) Sublimation
D) Freezing
- 49. Which ocean is the largest and deepest in the world?
A) Indian Ocean
B) Atlantic Ocean
C) Arctic Ocean
D) Pacific Ocean
- 50. What is the study of the universe beyond Earth's atmosphere called?
A) Astronomy
B) Cosmology
C) Meteorology
D) Geography
- 51. What is the Earth's primary source of energy?
A) Oceans
B) Sun
C) Moon
D) Stars
- 52. Which of these is responsible for the ozone layer depletion?
A) Chlorofluorocarbons (CFCs)
B) Methane
C) Sulfur dioxide
D) Carbon dioxide
- 53. What is the shape of DNA?
A) Double helix
B) Linear
C) Spiral
D) Circle
- 54. Where does the process of glycolysis take place in a cell?
A) Cytoplasm
B) Endoplasmic reticulum
C) Nucleus
D) Mitochondria
- 55. What science studies the behavior and properties of matter?
A) Chemistry
B) Biology
C) Astronomy
D) Physics
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