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24))己Listen and look at the pictures carefully. Discuss if the statements below are correct, incorrect, or if the information is not provided.

i. Fleming found out that some of his bacteria samples were contaminated by this green mold.

ili. A decade later, Chain and Florey made more advances.

iv. Alexander Fleming became one of the most important scientists named "Knight".

v. Penicillin is one of the most important discoveries of all times.

240))3：Listen again. Then take turns to ask and answer questions about what you heard. Use the past tense and the verbs in the box. Follow the examples below.

carry out · contaminate• discover • introduce isolate• produce• test

Student 1 When did Fleming discover penicillin?

Student 2 He discovered penicillin in 1928.

580Discuss the importance of the following discoveries.


Alexander Fleming (1881-1955).

Pennicillium in a Petri dish.

Fungus (Penicillum) growing in mold.

i. This great discovery took place in 1829.


X-rays.


The use of magnetic fields in health (MRI).

UNIT 2 • Discoveries • WHAT D0 I KNOW?

thirty-five

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