Information in Other Forms
SL.4.2
Read the text, then answer the questions.
How Penicillin Was Found
In 1928 Alexander Fleming went on holiday and left a stack of dishes on a bench. Each held a colony of bacteria. When he came back, one dish had a spot of mould on it. Around the mould was a clear ring where the bacteria had died. Fleming realised the mould was producing something that killed bacteria. He named it penicillin and published a paper. Almost nobody noticed. Ten years later, Howard Florey and Ernst Chain read that paper and tried to make penicillin in quantity. That turned out to be the hard part: it took two thousand litres of mould fluid to treat one patient. By 1944 the problem had been solved and penicillin was reaching soldiers in the field.
- 1. How would a timeline help a reader of this text?
- 2. What overall structure does this text use?
- 3. What would a photograph accompanying this text most usefully show?
What a Coral Reef Is
A coral reef looks like rock and is built by animals. A coral polyp is a soft creature the size of a pinhead. It draws calcium from the sea water and builds a hard cup around itself. Millions of polyps, cup upon cup, become a reef. Inside each polyp live tiny algae. The algae make food from sunlight and pass most of it to the polyp. In exchange they get shelter and the polyp's waste. Neither could build a reef alone. When the water gets too warm, the polyps expel the algae. Without them the coral turns white and starves. That is what bleaching means. A reef takes centuries to build and can bleach in a single hot summer.
- 1. How would a labelled cross-section help this text?
- 2. What would a diagram of a polyp need to label?
- 3. What overall structure does this text use?
LessonPrint · SL.4.2 · Set 20 · free to copy for classroom use