WEEK 7: PERSUASION (Isabel Martínez Puche)

Find out expressions to express persuasion, different from the ones offered in the textbook.

I can guarantee…

I tell you, it’s a fact.

I tell you, it’s certain.

I am absolutely certain.

I saw it myself.

I can assure you…

It’s quite true.

It must be true.

Yes, really. It’s quite true.

Come on.

Give it a try.

Try them on.

You won’t regret it.

This is once in your lifetime, don’t waste it. 

Find a text on the Internet where a hypothesis is discussed and underline the expresions for hypothesising.

Enzymes catalyze reactions by lowering the activation energy of the reaction. Catecholase, an enzyme found in potatoes, converts catechol to benzoquinone in the presence of oxygen. It would be expected that more benzoquinone would be formed in the presence of a greater amount of catecholase. This hypothesis was supported by the results obtained. The most enzyme was placed in tube 2. The absorbance was also highest for this tube. This means that the most product was formed in this test tube. In accordance with this, tube four, which had the least amount enzyme, also had the least amount of absorption. There were some unexpected results, but this is most probably due to human error; the absorbance levels were probably read wrong. Enzymes are affected by the environment. The pH level of the environment is one factor that can alter enzymes. The rate at which the enzyme form product is slowed or sped up depends on how close to the norm the environment is. In the second experiment, the pH of the medium was different in each of the test tubes. The general trend seen in these reactions was that the more acid added to the test tubes, the less product formed. The more acidic solution caused the enzyme to work less efficiently.