Table of Contents
100 Science Quiz Questions for Class 8
Are you looking for 100 science quiz questions for class 8 to test your knowledge? This quiz covers topics from physics, chemistry, biology, and general science, making it perfect for students who want to improve their science skills.
Science Quiz for Class 8 – Instructions
- Each question has four options, but only one is correct.
- Try to answer them before checking the solutions.
- Use this quiz for self-study, competitive exams, and school tests.
100 Science Quiz Questions for Class 8
- What is the SI unit of force?
a) Joule
b) Newton
c) Pascal
d) Watt - Which law explains why we wear seat belts in cars?
a) Newton’s First Law
b) Newton’s Second Law
c) Newton’s Third Law
d) Law of Gravitation - The time taken by light to travel from the Sun to Earth is approximately:
a) 8.3 seconds
b) 8.3 minutes
c) 83 seconds
d) 83 minutes - Which type of mirror is used in a car’s rearview mirror?
a) Plane mirror
b) Convex mirror
c) Concave mirror
d) None of the above - What happens when a north pole of a magnet is brought near another north pole?
a) They attract
b) They repel
c) No effect
d) They form a new magnet - What is the speed of light in a vacuum?
a) 3 × 10⁸ m/s
b) 3 × 10⁶ m/s
c) 3 × 10⁴ m/s
d) 3 × 10² m/s - Which device is used to measure electric current?
a) Voltmeter
b) Ammeter
c) Ohmmeter
d) Galvanometer - What is the unit of power?
a) Joule
b) Watt
c) Newton
d) Pascal - A body continues to move in a straight line unless acted upon by an external force. Which law states this?
a) First Law of Motion
b) Second Law of Motion
c) Third Law of Motion
d) Law of Gravitation - What is the main source of energy on Earth?
a) Moon
b) Stars
c) The Sun
d) Planets
- What is the chemical formula of water?
a) H₂O
b) CO₂
c) O₂
d) NaCl - Which gas is known as laughing gas?
a) Nitrogen
b) Carbon dioxide
c) Nitrous oxide
d) Hydrogen - What is the pH value of pure water?
a) 7
b) 5
c) 9
d) 10 - Which metal is the best conductor of electricity?
a) Copper
b) Silver
c) Gold
d) Aluminum - What is the chemical name of common salt?
a) Sodium chloride
b) Calcium carbonate
c) Potassium iodide
d) Sodium hydroxide
- Which organ is responsible for pumping blood in the human body?
a) Brain
b) Lungs
c) Heart
d) Liver - What is the powerhouse of the cell?
a) Nucleus
b) Mitochondria
c) Ribosomes
d) Golgi apparatus - Which vitamin is produced by the human body in sunlight?
a) Vitamin A
b) Vitamin B
c) Vitamin C
d) Vitamin D - Which part of the plant carries water from roots to leaves?
a) Xylem
b) Phloem
c) Stomata
d) Chloroplast - What is the main function of white blood cells?
a) Transport oxygen
b) Fight infections
c) Store energy
d) Produce hormones
- What is the hardest natural substance on Earth?
a) Iron
b) Diamond
c) Gold
d) Silver - What is the boiling point of water?
a) 50°C
b) 75°C
c) 100°C
d) 150°C - What gas do plants release during photosynthesis?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Hydrogen - Which planet is known as the Red Planet?
a) Venus
b) Mars
c) Jupiter
d) Saturn - What is the chemical symbol for gold?
a) Ag
b) Au
c) Pb
d) Fe - What is the SI unit of force?
a) Joule
b) Newton
c) Pascal
d) Watt - What does Newton’s First Law of Motion state?
a) An object remains at rest unless acted upon by an external force
b) Force equals mass times acceleration
c) Every action has an equal and opposite reaction
d) Gravity attracts all objects toward the Earth - Which type of mirror is used in a car’s rearview mirror?
a) Plane mirror
b) Convex mirror
c) Concave mirror
d) None of the above - What is the speed of light in a vacuum?
a) 3 × 10⁸ m/s
b) 3 × 10⁶ m/s
c) 3 × 10⁴ m/s
d) 3 × 10² m/s - What happens when a north pole of a magnet is brought near another north pole?
a) They attract
b) They repel
c) No effect
d) They form a new magnet - What is the unit of power?
a) Joule
b) Watt
c) Newton
d) Pascal - What is the main source of energy on Earth?
a) Moon
b) Stars
c) The Sun
d) Planets - What is the unit of electric resistance?
a) Ampere
b) Ohm
c) Volt
d) Watt - What type of energy is stored in a stretched rubber band?
a) Kinetic energy
b) Potential energy
c) Chemical energy
d) Nuclear energy - Which scientist discovered gravity?
a) Albert Einstein
b) Isaac Newton
c) Galileo Galilei
d) Thomas Edison
- What is the chemical formula of water?
a) H₂O
b) CO₂
c) O₂
d) NaCl - Which gas is known as laughing gas?
a) Nitrogen
b) Carbon dioxide
c) Nitrous oxide
d) Hydrogen - What is the pH value of pure water?
a) 7
b) 5
c) 9
d) 10 - What is the chemical name of table salt?
a) Sodium chloride
b) Potassium hydroxide
c) Calcium carbonate
d) Ammonium nitrate - Which metal is the best conductor of electricity?
a) Copper
b) Silver
c) Gold
d) Aluminum - What is the main component of natural gas?
a) Methane
b) Ethane
c) Propane
d) Butane - What type of reaction occurs when an acid reacts with a base?
a) Combustion
b) Neutralization
c) Decomposition
d) Oxidation - What is the chemical formula of carbon dioxide?
a) CO
b) CO₂
c) O₂
d) CH₄ - What is the atomic number of oxygen?
a) 6
b) 7
c) 8
d) 9 - What is the common name for H₂SO₄?
a) Hydrochloric acid
b) Sulfuric acid
c) Nitric acid
d) Acetic acid
- What is the powerhouse of the cell?
a) Nucleus
b) Mitochondria
c) Ribosomes
d) Golgi apparatus - Which vitamin is produced by the human body in sunlight?
a) Vitamin A
b) Vitamin B
c) Vitamin C
d) Vitamin D - Which organ is responsible for filtering blood?
a) Liver
b) Kidney
c) Lungs
d) Heart - What is the main function of red blood cells?
a) Fight infections
b) Transport oxygen
c) Produce energy
d) Digest food - What is the largest organ in the human body?
a) Liver
b) Heart
c) Skin
d) Brain - Which part of a plant absorbs water?
a) Stem
b) Leaves
c) Roots
d) Flowers - What is the scientific name of the human species?
a) Homo erectus
b) Homo habilis
c) Homo sapiens
d) Australopithecus - What pigment gives plants their green color?
a) Chlorophyll
b) Carotene
c) Xanthophyll
d) Hemoglobin - Which type of blood cells fight infections?
a) Red blood cells
b) White blood cells
c) Platelets
d) Plasma - What is the smallest bone in the human body?
a) Femur
b) Tibia
c) Stapes
d) Humerus
- What is the hardest natural substance on Earth?
a) Iron
b) Diamond
c) Gold
d) Silver - What gas do plants release during photosynthesis?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Hydrogen - Which planet is known as the Red Planet?
a) Venus
b) Mars
c) Jupiter
d) Saturn - What is the chemical symbol for gold?
a) Ag
b) Au
c) Pb
d) Fe - What is the main gas in the Earth’s atmosphere?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Hydrogen - Which animal is known as the king of the jungle?
a) Elephant
b) Tiger
c) Lion
d) Cheetah - What do bees collect from flowers to make honey?
a) Water
b) Pollen
c) Nectar
d) Sap - How many bones are in an adult human body?
a) 200
b) 206
c) 210
d) 215 - What is the boiling point of water in Celsius?
a) 50°C
b) 75°C
c) 100°C
d) 150°C - What is the lightest element in the periodic table?
a) Helium
b) Oxygen
c) Hydrogen
d) Carbon
100 Science Quiz Questions for Class 8 – Answer Key
Here are the answers to the 100 science quiz questions for class 8. Check your responses and see how well you scored!
- b) Newton
- a) An object remains at rest unless acted upon by an external force
- b) Convex mirror
- a) 3 × 10⁸ m/s
- b) They repel
- b) Watt
- c) The Sun
- b) Ohm
- b) Potential energy
- b) Isaac Newton
- a) H₂O
- c) Nitrous oxide
- a) 7
- a) Sodium chloride
- b) Silver
- a) Methane
- b) Neutralization
- b) CO₂
- c) 8
- b) Sulfuric acid
- b) Mitochondria
- d) Vitamin D
- b) Kidney
- b) Transport oxygen
- c) Skin
- c) Roots
- c) Homo sapiens
- a) Chlorophyll
- b) White blood cells
- c) Stapes
- b) Diamond
- a) Oxygen
- b) Mars
- b) Au
- c) Nitrogen
- c) Lion
- c) Nectar
- b) 206
- c) 100°C
- c) Hydrogen
- b) Oxygen
- c) Carbon dioxide
- c) 1,500 m/s
- d) 9.8 m/s²
- a) Potential energy
- c) Newton’s Third Law
- b) 1000 milliliters
- d) Temperature
- b) Joule
- c) Resistance
- b) H₂SO₄
- d) Helium
- b) Sublimation
- a) Boiling
- b) Copper
- c) Noble gases
- b) Carbon
- c) Ice
- b) Endothermic reaction
- d) Ozone
- a) Nervous system
- b) Skull
- c) Photosynthesis
- d) Chlorophyll
- a) Carnivores
- b) Liver
- c) Herbivores
- a) Vertebrates
- b) Omnivores
- c) Stem
- b) Magnetism
- a) Thermometer
- b) Evaporation
- c) Liver
- d) Stomata
- b) Xylem
- a) Ribosomes
- b) Heart
- c) Earthworm
- a) Insulator
- b) 37°C
- c) Reflex action
- a) Endoskeleton
- b) Bacteria
- c) Renewable energy
- b) Brain
- c) 4
- d) Copper
- b) Amphibians
- a) Oxygen
- c) Sound waves
- b) Electromagnetic waves
- a) Conduction
- d) Convection
- b) Thermal expansion
- c) Pressure
- a) Wind energy
- c) Hydroelectric power
- b) Gravity
- d) Fossil fuels
How Many Did You Get Right?
- 90-100 Correct: Excellent! You are a science expert!
- 70-89 Correct: Very good! Keep practicing!
- 50-69 Correct: Good effort! A little more revision will help.
- Below 50 Correct: No worries! Keep learning and try again.
This quiz helps strengthen your science concepts. If you want more quizzes or detailed explanations, let me know!