Module 5 - Scientific Investigations Flashcards
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What hypothesis did Marshall and Warren test regarding peptic ulcers?
That Helicobacter pylori bacteria cause peptic ulcers.
What unconventional method did Marshall use in his research?
He ingested H. pylori to demonstrate its effects.
How did Von Helmont’s experiment contribute to understanding plant growth?
He hypothesized that plants gain mass primarily from water.
What was a limitation of Von Helmont’s methodology?
He overlooked the role of other nutrients besides water.
How did Percy Spencer discover the heating properties of microwaves?
Accidentally, when a chocolate bar melted near radar equipment.
What was Eratosthenes’ significant contribution to science?
He accurately estimated Earth’s circumference using shadow measurements.
What is the Doppler Effect and who discovered it?
A change in frequency due to the motion of a source or observer, discovered by Christian Doppler.
How did Priestley contribute to chemistry?
He identified oxygen by heating mercuric oxide and collecting the gas.
Why is peer review important in scientific research?
It validates findings and ensures the credibility of the research.
How does the use of Aboriginal medicinal knowledge benefit modern science?
It offers valuable insights for developing new treatments ethically.
