Physics

This chapter covers topics, such as Contact Forces, Pressure, A Force Can Change the State of Motion, Exploring Forces, Non-contact Forces, Force - A Push or a Pull, and Pressure Exerted by Liquids and Gases.

This chapter covers topics, such as Increasing and Reducing Friction, Factors Affecting Friction, Fluid Friction, Force of Friction, and Friction : A Necessary Evil.

This chapter covers topics, such as Noise and Music, Sound Needs a Medium for Propagation, Sound Is Produced by a Vibrating Body, Noise Pollution, Amplitude, and Time Period and Frequency of a Vibration.

This chapter covers topics, such as Chemical Effects of Electric Current, Liquids Conduct Electricity, and Electroplating.

This chapter covers topics, such as Earthquake, Lightning, Charging by Rubbing, Charge, and Sparks and Electric Charges.

This chapter covers topics, such as Regular and Diffused Reflection, Reflected Light Can be Reflected Again, Sunlight - White or Coloured, Inside Our Eyes, Multiple Images, Care of Eyes, Laws of Reflection, and Braille System.

This chapter covers topics, such as The Stars and Constellations, Solar System, and The Moon.