Marshall & Warren (Peptic Ulcers)
This bacterium was repeatedly observed in biopsies and endoscope images of ulcer patients.
H pylori
This device, originally developed for radar, produces microwaves.
Magnetron
Van Helmont planted this species of tree for his long‑term experiment. (Starts with a W)
Willow tree
What observation did Eratosthenes base his experiment on?
On one day, light from the midday Sun would go down a well at a particular place.
Priestley originally called oxygen by this name.
Dephlogisticated air
Marshall used this instrument to look inside his own stomach and confirm he had no ulcers before self‑experimenting.
Endoscope
Spencer noticed this everyday object unexpectedly melted during magnetron testing.
Chocolate bar
His experiment challenged the old belief that plants gained mass from this source.
Soil
When the Sun went down the well at Syrene, was the Sun vertical back where Eratosthenes lived?
No
Doppler tested his hypothesis using musicians playing this instrument on a moving train.
Trumpets
Why did scientists think no microbes could live in the stomach?
It was too acidic
Microwaves heat food because they cause these molecules to vibrate.
Water and fat
After five years, the soil mass decreased by only this amount.
a) 0.001g
b) 0.1g
c) 6g
d) 6kg
C - 6g
How did Eratosthenes measure the distance from Syrene to Alexandria?
He made his servant walk it and measure it.
The Doppler Effect explains why light from receding stars shifts toward this colour.
Red
Warren and Marshall eventually were able to satisfy Koch's 2nd principle by growing H pylori in the .......
lab on petri dishes
In the butter‑and‑bread experiment, melted spots form at these points along the wave.
Nodes related to the wavelength of the microwave
Van Helmont’s reliability was low because he used this sample size.
One
His method relied on the assumption that these things arrive parallel to Earth.
Sun's rays
Priestley’s mint‑plant experiment demonstrated the role of plants in producing.......
Oxygen
How did Marshall satisfy Koch's 3rd principle - The pathogen must cause the same symptoms in a healthy host ?
He ingested H pylori and started getting pre ulcer inflammation
The true wavelength of a microwave oven is approximatelywhat value?
a) 1mm
b) 1cm
c) 10cm
d)1m
C - about 10 cm - actually closer to 12cm
After his experiment, Von Helmont came up with a new hypothesis. He said that the mass of trees came from ........
Water
Eratosthenes calculated the circumference of the Earth (which we know to be 40 008km) to be
a) 10 000km
b) 20 000km
c) 30 000km
d) 40 000km
d - 40 000km
Marshall, Spencer and Van Helmont all deviated from this traditional model of investigation.
linear scientific method