- Kangaroo is native animal of Australia
- Helium, neon and argon are called Noble Gases.
- Water is made of which two gases? Hydrogen and Oxygen.
- Copper is used in making brass, bronze and German silver.
- Which atom does not have a neutron? Hydrogen.
- The charge present on an electron is Negative.
- The charge present on a proton is Positive.
- Water was discovered by Cavendish.
- Most abundant element in human body is Oxygen.
- Which of the following is the lightest element of the periodic table? Hydrogen
- An instrument used for measuring atmospheric pressure is called Barometer.
- Natural radioactivity was discovered by Becquerel in 1896.
- Neutron was discovered by Chadwick.
- The circumference of the earth was determined by Al-Beruni.
- Telephone was invented by Graham Bell.
- SI unit of length is Meter, SI unit of force is Newton, Unit of work in SI units is Joule and Unit of Power in SI unit is Watt.
- Energy possessed by a body due to its motion is called Kinetic Energy.
- Lens which is thinner at the center and thicker at the edge is called Concave Lens .
- A lens which is thicker at the center and thinner at the edges is called Convex Lens.
- The diameter of a lens is called Aperture
- Ohm is unit of which quantity? Resistance
- Calorie is unit of which quantity? Heat
- Dyne is unit of which quantity? Force
- Angstrom is unit of which quantity? Length
- Becquerel is unit of which quantity? Radioactivity
- Who invented printing press? John Guttenberg
- A beam of white light passing through a prism scatters in Seven colours.
- How much time does the sun light take to reach the Earth? 8.5 minutes
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