A picture shows some transformations of energy. The energy from the sun passes to plants, to oil, to coal, to animals and to human beings; they take advantage of it by using the energy from oil, animals, coal, etc.

The voltmeter is an instrument which measures voltages (tensions or differences of potential) between both ends of an element in a circuit through which there is an electric current circulating.

Measure of the voltage. If you wish to measure the voltage in an electric circuit, you need a measuring device (multimeter)

Units of measurement indicate what is being measured. The number which precedes the unit of measurement indicates how much it measures.

The educational resource shows information about the concept tidal energy and its advantages and its disadvantages.

The following visual explains the precautions that should be taken into account when dealing with electricity

The educational resource shows information about the solar energy and its advantages and its disadvantages.

The material world which our eyes cannot observe is known as the microscopic scale of observation (cells, atoms, molecules, etc.)

The residual current circuit breaker (RCCB) is one of the elements of a consumer unit. The following visual explains its function.

Renewable energy sources are those which after being used can be regenerated naturally or artificially. The following pictures are graphic examples rof enewable energy sources.

The power switch is one of the elements of a consumer unit.

Phosphorescence is the luminescence produced by a mineral during a more or less long period of time, after the source of exciting radiation has ceased.

Oil is the product of the decomposition of the remains of microscopic living organisms which millions of years ago inhabited the seas, lakes and river estuaries. Oil today has a multitude of applications. This is why is it essential not to waste it simply as fuel. The following visual shows how it is formed and how it is used.

Concept of Ohm's law

The educational resource shows information about a nuclear power station, how it works and its advantages and its disadvantages.

Atom model concept

Model of a liquid concept

Model of a solid concept

Concept of matter has mass

Concept of matter has volume