Machines, electricity and inventions

An electrical machine used to convert sound into electrical energy so that it can be recorded

Property of matter related with the balance between electrons and protons

A negatively charged particle that is present in all atoms

To move freely, like water in a river

An electrical machine used to convert electrical energy into sound so we can hear it

A flat electronic device where images and text is displayed

A panel of keys on a computer which is used to type words

A very small component used to process information in a computer

A video camera connected to a computer

An important word within a text that indicates what the text is about

A service by which we can connect to the internet without cables

An electrical component used to close or open an electrical circuit

Electricity present in nature, caused by particles rubbing against each other

A small device containing memory that is used to store data or to transfer it from one device to another

The basic unit of matter