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C3 –Radioactive materials. Exhaust gases 400 MJ. Electricity x MJ. Coal 2000 MJ. Cooling steam y MJ. Question 1. Complete the Sankey diagram and then calculate the efficiency of this coal fired power station? . Question 2. Which is the odd one out? Explain why? Coal Electricity

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Question 1 l.jpg

Exhaust gases

400 MJ

Electricity

x MJ

Coal

2000 MJ

Cooling steam

y MJ

Question 1

Complete the Sankey diagram and then calculate the efficiency of this coal fired power station?


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Question 2

  • Which is the odd one out? Explain why?

    • Coal

    • Electricity

    • Gas

    • Oil


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Question 3

Which is the odd one out? Explain why?

  • Solar

  • Wind

  • Nuclear

  • Coal


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Question 4

Radon-22 has a half-life of one minute,

sketch a graph to show its half-life and

explain what the term half-life means.


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Question 5

Which of the following isotopes would be the best to use as a tracer in humans?


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Question 6

Which of the following isotopes would it be

best to use in a pill to treat thyroid cancer?


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Question 7

Which of the following statements is correct?

  • Electrons are found in the nucleus.

  • Protons are negatively charged.

  • All atoms of Carbon have same number of protons.

  • Radioactive decay can be slowed down by cooling the radioactive source.


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Question 8

Which of the following is the most important source of background radiation in the UK?

  • Food and drink

  • Radon gas

  • Cosmic rays

  • Waste from nuclear power stationsMonoxide


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Question 9

Which statement is False?

  • A few cm of air stops alpha radiation

  • A layer of dead skin stops alpha radiation

  • A few cm of aluminium stops gamma radiation

  • A few metres of concrete stops gamma radiation


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Question 10

Which of the following would not result in radioactive contamination?

  • Breathing in radon gas

  • Being injected with technetium-99m to trace kidney damage

  • Sterilising surgical equipment with a gamma emitter.

  • Treating thyroid cancer with Iodine-131


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Question 11

Which of the following is the correct block diagram for a nuclear power?

  • FurnaceBoilerTurbineGeneratorTransformer

  • FurnaceBoilerGeneratorTurbineTransformer

  • ReactorHeat exchanger GeneratorTurbineTransformer

  • ReactorHeat exchanger TurbineGeneratorTransformer


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Question 12

Spot the mistakes

Intermediate level waste has to be stored under water. This is because it is made up of spent fuel rods that are highly radioactive.


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Question 13

Spot the mistake

Nuclear fusion is when a neutron splits a uranium nucleus into two smaller nuclei and releases more neutrons, gamma rays and thermal energy.


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Question 14

Spot the mistake

The control rods in a nuclear power station are used to absorb protons and hence speed up or slow down the rate of nuclear fission.


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Question 15

Spot the mistake

Coal is a better means of producing electricity than natural gas because it produces less carbon dioxide.


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