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.
True.
The principle is completely different (from old batteries).
False.
A metal oxidizes sending electrons to do some work before they are regained by a substance being reduced
True.
The battery dies when it has oxidised.
True.
Electricity provides more electrons for the metal to be oxidised.
False.
- Put these events in chronological order. Complete who did what.
