1. Find equivalents:

2. False or true? 

1. Alexander Graham Bell was born in Scotland where he studied voice production and hearing.

2. Later he began to investigate the link between sound and electricity.

3. He formed the Bell Telephone Company in 1877 to protect his patent of transmission his voice electrically.

4. He used the profits from the production of his invention to built special schools for the deaf.

5. Bell went on inventing for the rest of his life, designing hydrofoils to make ships faster and kites capable of lifting people.

6. The unit of measuring the frequency of electromagnetic waves is measured in Hertz.

7. It was Hertz who predicted the existence of electromagnetic waves.

8. Hertz designed and built equipment that proved that these waves exist and could be detected at a distance.

9. He also managed to show that electromagnetic waves could be used to transmit messages across the Atlantic.

3. Find synonyms: 

stream, connection, difficulty, succeed, instance, ray, the same, differ, beam, distinguish, complexity, discover, flow, manage, identical, detect, humans, example, link, people.