Question 1
What is the source of the Sun's energy?
A
chemical reactions in the Sun's core
B
-emissions in the Sun's core
C
nuclear fission in the Sun's core
D
nuclear fusion in the Sun's core
Question 2
[Maximum number: 1]
Research is being carried out to produce electrical energy from the fusion of hydrogen nuclei.
Which row shows two of the problems in designing a fusion reactor?
temperature
needed
why obtaining a high density
of hydrogen nuclei is difficult
very low
the nuclei are negatively charged
and repel each other
very low
the nuclei are positively charged
and repel each other
very high
the nuclei are negatively charged
and repel each other
very high
the nuclei are positively charged
and repel each other
D
Question 3
[Maximum number: 1]
What is the main process by which energy is produced in the Sun?
A
combustion
B
nuclear fission
C
nuclear fusion
D
radioactive decay
C
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