1. How many planets are there in our solar system? 8
The 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
The 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 Lithosphere
The 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? Nitrogen
Carbon Dioxide Answer:Carbon Dioxide
5. Who wrote the book "The Origin of Species"? Stephen Hawking
Charles Darwin Sir Alexander Fleming
Another famous book by Charles Darwin is "Descent of Man".
6. Which of the following has an organic origin? Nylon
7. What is the name given to molten rocks erupted by a volcano? Firestone
Volcanic 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
The red color of the planet Mars is caused by iron oxide.
9. The three methods of science are observation, experimentation and _______. inference
10. Where is the Sea of Tranquility? On the Moon Near the Bermuda Triangle
In the Pacific Ocean
In the Atlantic Ocean
Answer:On the Moon
11. Which of the following is necessary for burning (combustion)? Nitrogen
12. Which gas in the atmosphere protects us from harmful ultraviolet radiations? Ozone Oxygen
13. The animal kingdom is formally classified into major groups known as Sub Phyla
14. Enzymes and anti-bodies are mainly made of Vitamins
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 Electrons
The 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
17. Who discovered Penicillin? Sir Alexander Fleming Louis Pasteur
Watson and Crick
Answer:Sir Alexander Fleming
Sir Alexander Fleming (Britain) discovered Penicillin in 1928.
18. Who invented the miner's safety-lamp? Thomas Alva Edison
Alexander Graham Bell
Sir Humphrey Davy Sir Frank Whittle
Answer:Sir Humphrey Davy
19. The Sun is a Huge Planet
The 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? Sulphuric Acid
21. Who discovered the circulation of blood? Hargobind Khorana
William Harvey Answer:William Harvey
William Harvey (Britain) discovered the circulation of blood in 1628.
22. A communicable disease can be passed on from one person to another. True False
23. The three states of matter are solid, liquid and gas. True False
24. The science that deals with the study of sound is known as acoustics. True False
Sound 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