M5 Big Ideas

Question 1

Marshall & Warren

Answer 1

Discovered that a major cause of peptic ulcers was bacteria living in the stomach. Barry Marshal deliberately infected himself and then took a course of antibiotics to cure the infection.

Question 2

Von Helmont

Answer 2

Undertook a systematic investigation to determine what plants ‘ate’. He concluded that plants only needed water to survive.

Question 3

Spencer

Answer 3

Was working on radar arrays when he found that a chocolate bar in his pants had melted. His idea that the microwaves from the equipment could be used to cook food led to the development of the microwave oven.

Question 4

Eratosthenes

Answer 4

Used his knowledge of mathematics to work out the circumference of the Earth.

Question 5

Doppler

Answer 5

Used observations of the spectra of binary stars to determine that the observed wavelength of a wave changed based on the relative velocity of the wave and the observer.

Question 6

Priestley

Answer 6

Performed experiments to discover oxygen.

Question 7

Independent, dependent and controlled variables

Answer 7

IV is deliberately altered during an investigation. D is what is measured. CV are all the other aspects that must be kept the same during the investigation.

Question 8

Validity & Reliability

Answer 8

V is about whether you are testing what you set out to do. R is when your results are fairly consistent.

Question 9

Primary & Secondary data

Answer 9

PD is data you collect yourself. SD is data you get from another source.

Question 10

Ethical Issues

Answer 10

An idea or event that may conflict with a person’s personal views.