Life Cycle of Stars — Homi Bhabha Exam Physics MCQs with Solutions
Free Homi Bhabha Exam Physics Life Cycle of Stars MCQs with step-by-step solutions (6 questions). Part of Observing Space / Astronomy. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Life Cycle of Stars · medium · theory
Stars are born from huge clouds of gas and dust called:
A. craters
B. comets
C. asteroids
D. nebulae ✓ Correct
Solution: A star forms when a nebula (cloud of gas and dust) contracts under gravity.
Q2 — Life Cycle of Stars · hard · theory
Stars, including the Sun, produce their enormous energy by:
A. chemical reactions
B. burning coal
C. nuclear fusion of hydrogen into helium ✓ Correct
D. nuclear fission of uranium
Solution: In the core, hydrogen nuclei fuse into helium, releasing vast energy (nuclear fusion).
Q3 — Life Cycle of Stars · medium · theory
The main fuel that powers the Sun at present is:
A. oxygen
B. carbon
C. helium
D. hydrogen ✓ Correct
Solution: The Sun mainly fuses hydrogen into helium in its core.
Q4 — Life Cycle of Stars · hard · theory
A medium-sized star like the Sun will, near the end of its life, first swell into a:
A. white dwarf directly
B. neutron star
C. black hole
D. red giant ✓ Correct
Solution: A Sun-like star expands into a red giant, then sheds its outer layers to leave a white dwarf.
Q5 — Life Cycle of Stars · hard · theory
A very massive star ends its life in a huge explosion called a:
A. meteor shower
B. nebula
C. solar eclipse
D. supernova ✓ Correct
Solution: Massive stars explode as supernovae, leaving behind a neutron star or a black hole.
Q6 — Life Cycle of Stars · medium · theory
The final remnant of a low-mass star like the Sun, after it has exhausted its fuel, is a:
A. red giant
B. black hole
C. supernova
D. white dwarf ✓ Correct
Solution: After the red giant stage, a Sun-like star leaves a small, dense, hot white dwarf.