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6. What type of objects emits radiation?

  • All objects emit radiation.
  • Only hot objects emit radiation.
  • Only poisonous gases emit radiation.
  • Only hot liquids emit radiation.

7. What is conduction of heat?

  • The process when vibrating particles pass on extra kinetic energy to neighbouring particles.
  • The process when hot particles pass on heat energy to neighbouring particles.
  • The process when hot particles pass vibrate, so they become cold but the particle next to them becomes hot, and they destroy their neighbouring particle.

8. In what state does convection occur?

  • It liquids and solids.
  • In solids and gases.
  • In gases and liquids.
  • It solids, liquids and gases.