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1. How many planets are there in our solar system? 8
9 10
12
Answer: 9The nine planets in our solar system can be divided into two groups. Mercury, Venus, Earth and Mars form the dense rocky inner planets. Jupiter, Saturn, Uranus, Neptune and Pluto form the gaseous or icy outer planets. 2. What is the total number of bones in the human body? 32
196
206 512
Answer: 206The human skeleton consists of 206 bones (babies have over 300). Bones manufacture red blood cells and store calcium. 3. The Earth is surrounded by an insulating blanket of gases which protects it from the light and heat of the Sun. This insulating layer is called the Atmosphere Lithosphere
Hydrosphere
Biosphere
Answer: AtmosphereThe atmosphere protects the Earth's surface from the Sun's harmful ultraviolet rays. It also regulates the temperature.
4. Which gas evolves when charcoal is burnt? Carbon Dioxide Nitrogen
Ozone
Oxygen
Answer: Carbon Dioxide 5. Who wrote the book "The Origin of Species"? Charles Darwin Stephen Hawking
Sir Alexander Fleming
Louis Pasteur
Answer: Charles DarwinAnother famous book by Charles Darwin is "Descent of Man". 6. Which of the following has an organic origin? Coal Nylon
Sand
Bakelite
Answer: Coal 7. What is the name given to molten rocks erupted by a volcano? Lava Firestone
Crater
Geyser
Answer: LavaVolcanic activity is caused by disturbances in the Earth's crust. This can force eruptions to release lava (molten rocks) from deep within the Earth to the surface. 8. Which planet is known as the Red Planet? Earth
Mercury
Mars Jupiter
Answer: MarsThe red color of the planet Mars is caused by iron oxide. 9. The three methods of science are observation, experimentation and _______. inference
deduction
hypothesis
measurement
Answer: measurement 10. Where is the Sea of Tranquility? Near the Bermuda Triangle
In the Pacific Ocean
In the Atlantic Ocean
On the Moon
Answer: On the Moon 11. Which of the following is necessary for burning (combustion)? Nitrogen
Oxygen Carbon
Petrol
Answer: Oxygen 12. Which gas in the atmosphere protects us from harmful ultraviolet radiations? Ozone Oxygen
Nitrogen
Carbon Dioxide
Answer: Ozone 13. The animal kingdom is formally classified into major groups known as Sub Phyla
Phyla Orders
Families
Answer: Phyla 14. Enzymes and anti-bodies are mainly made of Vitamins
Carbohydrates
Fats
Proteins
Answer: Proteins 15. The atom is made of Positrons, Neutrons and Electrons
Protons and Quarks
Neutrinos, Gamma Rays and Positrons
Protons, Neutrons and Electrons
Answer: Protons, Neutrons and ElectronsThe nucleus of the atom is made up of protons (positively charged particles) and neutrons (neutral particles). The electrons (negatively charged particles) spin in orbits around the nucleus. 16. Which rare element would you associate with Marie and Pierre Curie? Platinum
Gold
Radium Uranium
Answer: Radium 17. Who discovered Penicillin? Louis Pasteur
Watson and Crick
Robert Koch
Sir Alexander Fleming
Answer: Sir Alexander FlemingSir Alexander Fleming (Britain) discovered Penicillin in 1928. 18. Who invented the miner's safety-lamp? Thomas Alva Edison
Sir Humphrey Davy Alexander Graham Bell
Sir Frank Whittle
Answer: Sir Humphrey Davy 19. The Sun is a Star Huge Planet
Satellite
Comet
Answer: StarThe Sun is our closest star and is a spinning ball of gases. The nuclear reactions taking place in its core create heat and light. 20. What is known as the universal solvent? Water Sulphuric Acid
Hydrochloric Acid
Aqua Regia
Answer: Water 21. Who discovered the circulation of blood? Hargobind Khorana
Louis Pasteur
Edward Jenner
William Harvey
Answer: William HarveyWilliam Harvey (Britain) discovered the circulation of blood in 1628. 22. A communicable disease can be passed on from one person to another. True False
Answer: True 23. The three states of matter are solid, liquid and gas. True False
Answer: True 24. The science that deals with the study of sound is known as acoustics. True False
Answer: TrueSound is created by the vibration of objects. The vibrations cause the air to be compressed into sound waves. The loudness of sound is measured in decibels (db). 25. The tail of a comet always points towards the Sun. True
False
Answer: False
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