成人快手

  • Solids, liquids and gases

    • Solids, liquids and gases

      The arrangement, movement and spacing of particles are different in solids, liquids and gases. Find out more with 成人快手 Bitesize. For students between the ages of 11 and 14.

    • Changes of state

      To change the state of a substance, energy must be transferred to or from the substance. Find out more with 成人快手 Bitesize. For students between the ages of 11 and 14.

    • Pressure in fluids

      Liquids and gases are both fluids. Fluids can flow or be poured, because the particles in them are able to move around freely and can change positions.

    • Densities of solids, liquids and gases

      The density of an object is calculated by dividing the mass by the volume. Find out more with 成人快手 Bitesize. For students between the ages of 11 and 14.