Question
Which nuclear reaction produces the release of energy to power a star?
A nuclear fission of helium into hydrogen
B nuclear fission of hydrogen into helium
C nuclear fusion of helium into hydrogen
D nuclear fusion of hydrogen into helium
▶️Answer/Explanation
Ans: D
Question
Which row describes the power source for a stable star?
▶️Answer/Explanation
Ans: C
Question
The nearest star to the Sun is about four light-years away from the Earth.
A student makes three statements about the star.
- Light from the star takes about four years to reach the Earth.
- Light from the Sun takes about four years to travel to the star and back to the Earth.
- The star is outside our galaxy.
Which statements are correct?
A 1,2 and 3
B 1 and 3 only
C 1 only
D 2 and 3 only
▶️Answer/Explanation
Ans:C