P1 Energy transfer by heating

ENERGY TRANSFER BY HEATING

Infrared radiation

• Infrared radiation is energy transfer by electromagnetic waves.
• All objects emit infrared radiation.
• The hotter an object is the more infrared radiation it emits in a given time.

Surfaces and radiation

• Dark, matt surfaces emit infrared radiation more quickly than light, shiny surfaces.
• Dark, matt surfaces absorb infrared radiation more quickly than light, shiny surfaces.
• Light, shiny surfaces reflect more infrared radiation than dark, matt surfaces.

States of matter

• Flow, shape, volume and density are the properties used to describe each state of matter.
• The particles in a solid are held next to each other, vibrating in their fixed positions.
• The particles in a liquid move about at random and are in contact with each other.
• The particles in a gas move about randomly and are much farther apart than particles in a solid or liquid.

Conduction

• Metals are the best conductors.
• Metals such as…