Access 4 Unit 2b

Who discovered penicillin by accident in 1928?

• Thomas Edison

• Percy Lebaron Spencer

• Alexander Fleming

• Marie Curie

What was Alexander Fleming experimenting with when he discovered penicillin?

• Electricity

• Bacteria

• Chemicals

• Plants

How did Alexander Fleming realize that the mould was able to destroy harmful bacteria?

• He heard a sound from the mould

• He smelled the mould

• He tasted the mould

• He saw something around the mould

What did Percy Lebaron Spencer notice when he stood in front of a magnetron in 1946?

• His hair was on fire

• His phone was ringing

• His chocolate bar had melted

• His shoes were untied

What did Percy Lebaron Spencer use to test the effect of the magnetron?

• Egg

• Popcorn kernels

• Chocolate bar

• Kettle

What did Percy Lebaron Spencer realize could be used to cook with after his experiments?

• X-rays

• Ultraviolet rays

• Infrared light

• Microwave radio signals

In what year did Percy Lebaron Spencer develop the microwave oven?

• 1928

• 1946

• 1950

• 1947

What did Alexander Fleming discover that has helped millions of people recover from infections?

• Vaccine

• Antibiotics

• Painkillers

• Antiseptics

What was the profession of Percy Lebaron Spencer?

• Engineer

• Doctor

• Scientist

• Teacher

Which of the following is NOT an accidental discovery mentioned in the text?

• Popcorn explosion

• Penicillin

• Microwave oven

• Vaccine