arrow_backBack to Study Resources

Quiz Chapter 12: Solar System

10 questions · Form 2 Science Bab 12: Solar System

Question 1 of 10Score: 0

What would happen to Earth's surface temperature if all greenhouse gases were completely removed from the atmosphere?

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 would happen to Earth's surface temperature if all greenhouse gases were completely removed from the atmosphere?

  1. Surface temperature would remain completely unchanged
  2. Earth would become extremely hot like Venus
  3. Average surface temperature would drop drastically below freezing point (~ -18°C)
  4. Oceans would boil off into space
Show answer

Answer: C

Without a natural greenhouse effect, Earth would lose heat rapidly, causing global temperatures to drop to around -18°C, freezing water completely.

2. 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
Show answer

Answer: B

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

3. Which characteristic is typical of Jovian (gas and ice giant) planets?

  1. Solid rocky surface with high density
  2. Small diameter with zero natural satellites
  3. Composition mainly of hydrogen, helium, and low density with ring systems
  4. Short orbital periods around the Sun
Show answer

Answer: C

Jovian planets (Jupiter, Saturn, Uranus, Neptune) are massive gas/ice giants with low overall densities, ring systems, and dozens of moons.

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

  1. Earth
  2. Mars
  3. Venus
  4. Jupiter
Show answer

Answer: C

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

5. The 'Goldilocks Zone' refers to which planetary concept?

  1. An asteroid belt rich in gold and precious metals
  2. The circumstellar habitable zone around a star where liquid water can exist
  3. The interior core of gas giant planets
  4. The bright central ring system of Saturn
Show answer

Answer: B

The habitable zone (Goldilocks Zone) is the ideal distance range from a star where temperatures allow liquid water to remain stable on a planet's surface.

6. Which gas makes up the majority of Earth's atmosphere (~78%)?

  1. Oxygen
  2. Carbon dioxide
  3. Nitrogen
  4. Argon
Show answer

Answer: C

Earth's atmosphere consists of approximately 78% nitrogen, 21% oxygen, and 1% trace gases.

7. Why is Venus HOTTER than Mercury, despite being further away from the Sun?

  1. Venus is closer to volcanic solar flares
  2. Venus has a thick atmosphere of carbon dioxide trapping heat via an extreme greenhouse effect
  3. Venus generates energy through internal nuclear reactions
  4. Venus absorbs heat directly from its multiple moons
Show answer

Answer: B

Venus' dense atmosphere consists of over 96% carbon dioxide, trapping solar heat in a runaway greenhouse effect, making its surface temperature over 460°C.

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

  1. Mercury
  2. Saturn
  3. Neptune
  4. Uranus
Show answer

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).

9. Which planet is the closest to the Sun in our Solar System?

  1. Venus
  2. Mercury
  3. Mars
  4. Earth
Show answer

Answer: B

Mercury is the first planet from the Sun at an average distance of about 58 million kilometers.

10. 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
Show answer

Answer: B

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

Sponsored