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Quiz Chapter 11: Stars and Galaxies in the Universe

10 questions · Form 2 Science Bab 10: Stars and Galaxies in the Universe

10 questions · plays in fullscreen

Full Question List & Answer Key

Prefer reading to quizzing? All 10 questions are listed below with the answer and explanation under each one.

1. In what chronological order does a medium-mass star evolve throughout its life?

  1. Nebula -> Main Sequence -> Red Giant -> White Dwarf
  2. Main Sequence -> Nebula -> Supernova -> Black Hole
  3. Red Giant -> White Dwarf -> Nebula -> Protostar
  4. Supernova -> Red Giant -> Main Sequence -> White Dwarf
Show answer

Answer: A

Stars form in a Nebula, enter the Main Sequence stage, expand into a Red Giant, and eventually shrink into a White Dwarf.

2. When a medium star exhausts the hydrogen fuel in its core, it swells in size and cools down to become a:

  1. Blue giant
  2. Red giant
  3. Neutron star
  4. Black hole
Show answer

Answer: B

When hydrogen fuel depletes, the star's core contracts while its outer shell expands greatly and cools, forming a Red Giant.

3. Which star color indicates the HOTTEST surface temperature?

  1. Red
  2. Yellow
  3. Orange
  4. Blue
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Answer: D

Blue stars have the highest surface temperatures (ranging from 25,000 K to over 50,000 K), whereas red stars are the coolest.

4. What force pulls cosmic hydrogen gas and dust together inside a nebula to initiate star formation?

  1. Electrostatic force
  2. Magnetic attraction force
  3. Gravitational force
  4. Frictional force
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Answer: C

Gravitational attraction slowly pulls gas and dust particles toward a central point inside a nebula, increasing density and pressure until nuclear fusion ignites.

5. Which of the following stars would have a surface temperature closest to approximately 5,500°C - 6,000 K?

  1. A red supergiant like Betelgeuse
  2. A yellow star like our Sun
  3. A blue giant star like Rigel
  4. A cool red dwarf star
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Answer: B

Our Sun is a yellow main-sequence star with a surface temperature of around 5,700 - 6,000 Kelvin.

6. Which galaxy is the NEAREST major spiral galaxy to our Milky Way?

  1. Messier 87
  2. Andromeda Galaxy
  3. Sombrero Galaxy
  4. Triangulum Galaxy
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Answer: B

The Andromeda Galaxy (M31) is the nearest major spiral galaxy to the Milky Way, located about 2.5 million light-years away.

7. What structural category of galaxy does our Milky Way belong to?

  1. Elliptical galaxy
  2. Irregular galaxy
  3. Spiral galaxy
  4. Lenticular galaxy
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Answer: C

The Milky Way is classified as a spiral galaxy, featuring a rotating disk with prominent spiral arms.

8. What will be the final remnants of a medium-sized star like our Sun at the end of its life cycle?

  1. Black Hole
  2. Neutron Star
  3. White Dwarf
  4. Supernova
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Answer: C

After expanding into a Red Giant and casting off its outer layers as a planetary nebula, a medium-mass star cools down to become a White Dwarf.

9. Which galaxy type lacks a distinct symmetrical shape or central bulge?

  1. Spiral galaxy
  2. Barred spiral galaxy
  3. Elliptical galaxy
  4. Irregular galaxy
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Answer: D

Irregular galaxies have chaotic, irregular shapes without a defined spiral structure or central elliptical nucleus.

10. What is a NEBULA in the context of astronomy?

  1. A black hole sucking in surrounding stars
  2. A dense cloud of interstellar gas and cosmic dust where stars are born
  3. A dead planet drifting in outer space
  4. A high-energy laser beam emitted by neutron stars
Show answer

Answer: B

A nebula is a vast cloud of dust and hydrogen gas in space that serves as the birth site for new stars.

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