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D - Science - Ch 9
Nuclear Energy
| Question | Answer |
|---|---|
| What is the central core of an atom that contains the protons and neutrons? | nucleus |
| What are the 2 type of nuclear reactions? | fission and fusion |
| What do nuclear reactions convert matter into? | energy |
| What is the formula developed by Albert Einstein? | E=mc2 |
| What does Albert Einstein's formula describe? | the relationship between energy and matter |
| What is the splitting of an atom's nucleus into 2 smaller nuclei called? | nuclear fission |
| In a controlled nuclear chain reaction, what can the energy released as heat be used to do what? | generate electricity |
| How is electricity produced in a nuclear power plant? | the heat released from the reactions is used to change water into steam, which then turns the blades of a turbine to generate electricity |
| Which part of a nuclear reactor contains the uranium? | fuel rod |
| Which part of a nuclear reactor is where the nuclear fission occurs? | reactor vessel |
| Which part of a nuclear reactor controls the reactions? | control rod |
| Which part of a nuclear reactor changes hot water to steam? | heat exchanger |
| What is the condition called when fuel rods in a nuclear power plant generates so much heat that they start to melt? | meltdown |
| Why is it difficult to dispose of radioactive wastes produced by power plants? | because they remain dangerous for thousands of years |
| What is the combining of two atomic nuclei to produce a single larger nucleus? | nuclear fusion |
| In nuclear fusion, what is created when 2 hydrogen nuclei are combined? | a helium nucleus |
| What happens to the lost mass when a helium nucleus is created? | it is converted to energy |