Answers to Saturday Adventures Abroad Quiz

Question 1 Krill are very vulnerable to ocean acidification caused by climate change, which endangers the whole marine food chain. True or False False. Nicole’s experiments suggest krill have surprising resilience to more acidic water. So, not VERY vulnerable – some people have called them the cockroaches of the sea. But hey, let’s not push it too far!
Question 2 Krill’s closest relatives are a.     Prawns

b.     Cockroaches

c.     Blue whales

d.     30 other species of Krill

 

30 other species of krill. They are in their own Order Euphausiacea. They are in the same Class as crustaceans, so kind of cousins of prawns.
Question 3 Places krill are found a.     Antarctica

b.     Caribbean

c.     Mediterranean

d.     Pacific ocean

e.     Arctic

f.      Lake Burley Griffin

 

All but Lake Burley Griffin. They’re one of the most widespread species.
Question 4 Fusion fuel tritium (plus deuterium) carries more energy per gram than petrol by a factor of a.     3

b.     30

c.     3000

d.     300,000

e.     30 million

30 million. Actually Bert’s wrong, Antimatter has a higher energy density than tritium, by a factor of 300.

 

Fusion fuel has quadruple the energy density of uranium in fast breeder reactors https://en.wikipedia.org/wiki/Energy_density_Extended_Reference_Table

Question 5 The temperature of the core of the sun is 10 million degrees. ITER’s core will be a.     1,000 degrees

b.     100,000 degrees

c.     10 million degrees

d.     100 million degrees

e.     1 billion degrees

 

100 million degrees. Yep, ten times hotter than the sun. Put enough energy into a small enough quantity of fuel, it’s possible to reach these temperatures

 

Question 6 The sun burns tritium True or False False: the sun burns hydrogen, which is much less energy dense than tritium. ITER will be a much more efficient fusion reactor.
Question 7 Gravitational Waves are the first proof ever of Einstein’s Theory of General Relativity True or False False. It’s used regularly for satellite positioning, for example – GPS would not work without the theory. This is the first proof of it in a high-gravity situation. Like REALLY high gravity – much higher than falling into the sun, for example.
Question 8 LIGO (Laser Interferometer Gravitational-Wave Observatory) ran for 50 years before making the first detection. True or False False. LIGO Mark 1 first searched for gravitational waves in 2002, although the scientists mostly believed (correctly) it was not sensitive enough to make a detection. After significant upgrades Advanced LIGO was opened 2015 and detected a black hole collision immediately. (Technically, they were still testing!)
Question 9 In the first collision of two neutrons stars, observed by LIGO 3 years ago, approximately how much gold was created? a.     1 tonne

b.     100 tonnes

c.     1 billion tonnes

d.     The mass of the earth (10^24 kg)

e.     None, gold is created by Clive Palmier.

 

Mass of earth.
Question 10 What is the scientific significance of the following numbers, (chosen by Dramatis Scientificae for their Patreon tiers). a.     3.14

b.     8

c.     17

d.     26

e.     42

f.      118

g.     451

h.     1022

Answers at Patreon.com/dramsci

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