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ENERGY 4º (HEAT AND TEMPERATURE (How heats affects bodies. (Change of…
ENERGY
4º
Sources of energy
Types
Non-renewable
they run out
Coal: from mines
Oil: to produce petrol
Gas: by digging holes
Renewable sources
never run out
Wind: procuces electricity
Hydroelectric: water procuces electricity
Solar: Sun procudes other types of ebergy
HEAT AND TEMPERATURE
Temperature
It is measured with a
thermometer
. A Body have low or high temperature
Heat
The transfer of energy from one body to another untill both bodies are in
thermal equilibrium
How heats affects bodies.
Change of volume
Contraction
Expansion
Change os state
Condensation, solidification
Evaporation, fusion
Change of temperature
Getting colder or hotter.
