«How Batteries Work» by Adam Jacobson

 First activity: Complete the text

Batteries are a triumph of science because they allow smart phones and other technologies to exist without making us to an infernal tangle of power cables. Yet even the best batteries will diminish daily, slowly losing capacity until they finally die.

Second activity: Answer the questions

Q: Where were Luigi Galvani and Alessandro Volta from?
A: They were from Italy.

Q: When did they become important scientists?
A: The became important scientists in the 1780s.

Q: Which animal did they use for their experiments?
A: They used a frog.
Third activity: Passive voice

1- Complete the sentences

The reactions in a battery are called “oxidation” and “reduction”.
Electrons are lost in a process called “oxidation”.
These electrons are regained by the water.
Hydrogen gas is produced in the “reduction” process.
The standard unit of electric potential is called “volt”.
A flow of electrons between two metals are produced by the combination of “oxidation” and “reduction” processes
2- Why do you need PRESENT tense only?

Because we are talking about things that happens nowadays or things that are called of that way in the present.

Fourth activity: True or False

In modern batteries, scientists replaced the chemical solution with dry cells filled with chemical paste.

The principle is completely different (from old batteries).

A metal oxidizes sending electrons to do some work before they are regained by a substance being reduced

The battery dies when it has oxidised.

Electricity provides more electrons for the metal to be oxidised.

  • Put these events in chronological order. Complete who did what.
(according to the video). Copy the final narrative text.

 Both were italian scientists in the 18th century Luigi Gialvani made and experiment with frogs used a metal instrument to touch the frog's leg muscle jump, called this violent movement of the leg: ''Animal Electricity''. Thougth that this electricity  was the essence of life. But He thought that there wasn't and ''Animal Electricity'' but a reaction to the metallic tool. Then he made an experiment with zinc and copper separated by the paper soaked in a salt water solution and created the first battery.