890626
Questão 1
Questão
True or false? Nuclear fission is caused by firing a neutron at a fissionable nucleus.
Responda
- True
- False
Questão 2
Questão
What is enriched uranium?
Responda
-
Another term for U-235
-
A sample of uranium with about 2-3% fissionable U-235 in it
-
The term used for high-grade uranium
Questão 3
Questão
Which of these roles does water perform in a nuclear reactor?
Responda
-
Reactor core
-
Pressuriser
-
Moderator
-
Control rods
-
Coolant
Questão 4
Questão
Which part of the nuclear fission reactor is made out of boron?
Responda
-
Reactor core
-
Turbine
-
Control rods
Questão 5
Questão
Which type of nuclear reaction takes place in stars?
Responda
-
Nuclear fission
-
Nuclear fusion
Questão 6
Questão
True or false? Two protons fuse to produce "heavy helium".
Responda
- True
- False
Questão 7
Questão
True or false? In a fusion reactor, the temperature must be very high to overcome forces of reaction and the plasma must be contained in a magnetic field.
Responda
- True
- False
Questão 8
Questão
What is the reaction product of fusion of hydrogen?
Responda
-
Uranium
-
Lithium
-
Thorium
-
Helium
Questão 9
Questão
What type of radiation is radon gas a source of?
Responda
-
Alpha
-
Beta
-
Gamma
Questão 10
Questão
Where was there a nuclear accident in 1986?
Responda
-
Bikini Atoll
-
Fukushima
-
Chernobyl
Questão 11
Questão
How can workers reduce their radiation dose?
Responda
-
Keeping a safe distance from radiation sources
-
Using lead or concrete sources to shield themselves
-
Wearing rubber gloves
-
Drinking a glass of water after exposure
Questão 12
Questão
When was the Big Bang?
Responda
-
3 million years ago
-
13 million years ago
-
3 billion years ago
-
13 billion years ago
Questão 13
Questão
What name do we give a large cluster of stars?
Responda
-
Comet
-
Constellation
-
Asterism
-
Galaxy
Questão 14
Questão
True or false? The "Dark Age" of the universe began when the universe became transparent.
Responda
- True
- False
Questão 15
Questão
True or false? A protostar is a star that is at the end of its life cycle.
Responda
- True
- False
Questão 16
Questão
Which stages would you expect a star to go through if it were a small main sequence star?
Responda
-
Red supergiant
-
Red giant
-
White dwarf
-
Supernova
-
Black hole
-
Black dwarf
-
Neutron star
Questão 17
Questão
Which stages would you expect a star to go through if it were a large main sequence star?
Responda
-
Red supergiant
-
Red giant
-
White dwarf
-
Supernova
-
Black dwarf
-
Black hole
-
Neutron star
Questão 18
Questão
What is the heaviest element that can be formed by nuclear fusion?
Responda
-
Manganese
-
Iron
-
Cobalt
Questão 19
Questão
True or false? Heavy elements such as lead are formed during supernovae.
Responda
- True
- False
Questão 20
Questão
True or false? The heaviest naturally-occurring element is mendelevium.
Responda
- True
- False
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