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Quiz Chapter 12: Solar System

10 questions · Form 2 Science Bab 12: Solar System

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. What protective layer in Earth's atmosphere shields living organisms from harmful ultraviolet (UV) radiation?

  1. Troposphere layer
  2. Ozone layer
  3. Carbon dioxide blanket
  4. Ionosphere layer
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Answer: B

The ozone layer ($O_3$) located in the stratosphere absorbs the majority of dangerous ultraviolet radiation emitted by the Sun.

2. Which natural phenomenon occurs when solar wind particles interact with Earth's magnetic field near the polar regions?

  1. Solar eclipses
  2. Auroras (Northern and Southern Lights)
  3. Tsunami waves
  4. Meteor showers
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Answer: B

Auroras occur when solar wind particles collide with atmospheric gases near Earth's magnetic poles, producing glowing curtains of light.

3. Which group contains ONLY Terrestrial (inner) planets?

  1. Jupiter, Saturn, Uranus, Neptune
  2. Mercury, Venus, Earth, Mars
  3. Mercury, Earth, Jupiter, Saturn
  4. Mars, Jupiter, Uranus, Neptune
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Answer: B

The four inner planets (Mercury, Venus, Earth, Mars) are terrestrial planets characterized by solid, rocky surfaces.

4. Which planet in the Solar System possesses the LARGEST mass and strongest gravitational pull?

  1. Saturn
  2. Neptune
  3. Jupiter
  4. Earth
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Answer: C

Jupiter is the largest planet, containing more than double the combined mass of all other planets, giving it the strongest gravitational pull.

5. Which planet rotates in a clockwise direction (retrograde rotation) contrary to most other planets?

  1. Earth
  2. Mars
  3. Venus
  4. Jupiter
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Answer: C

Venus rotates clockwise on its axis from east to west (retrograde rotation), unlike Earth and most planets which rotate counter-clockwise.

6. Why do gas giant planets like Saturn have a lower average density than small rocky planets like Earth?

  1. They are hollow inside
  2. They are composed predominantly of lightweight gases like hydrogen and helium
  3. Their immense distance from the Sun reduces mass
  4. They rotate too quickly for gravity to compress them
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Answer: B

Gas giants consist mainly of light gaseous elements (hydrogen and helium), giving them low mean densities (Saturn's density is even less than that of water).

7. What is the primary role of Earth's magnetosphere in protecting life?

  1. It generates gravity to keep oceans from floating away
  2. It deflects harmful solar winds and cosmic charged particles away from Earth
  3. It prevents meteorites from entering the atmosphere
  4. It maintains constant global atmospheric pressure
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Answer: B

Earth's magnetic field (magnetosphere) deflects high-energy solar winds and cosmic radiation, preserving our atmosphere.

8. Which planet is famous for rotating almost completely on its side with an axial tilt of about 98 degrees?

  1. Uranus
  2. Saturn
  3. Mars
  4. Venus
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Answer: A

Uranus has an extreme axial tilt of approximately 98°, causing it to rotate virtually on its side relative to its orbital plane.

9. Which planet has the longest orbital period around the Sun?

  1. Mercury
  2. Saturn
  3. Neptune
  4. Uranus
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Answer: C

As the furthest planet from the Sun (~4.5 billion km), Neptune takes the longest time to complete one revolution (approx. 165 Earth years).

10. How does a planet's distance from the Sun affect the time it takes to complete one full orbit (orbital period)?

  1. Further planets orbit much faster, taking less time
  2. Orbital period remains exactly 365 days for all planets
  3. Further planets have larger orbital paths and weaker gravitational attraction, taking much longer time
  4. Distance has zero relationship with orbital period
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Answer: C

Planets further from the Sun have longer orbital circumferences and weaker solar gravity, resulting in significantly longer orbital periods.

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