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CTET Solar System — practice questions

Explore 64 free Solar System questions in CTET Social Studies. Open each question or exercise to read its content, reference answers and available explanation.

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Solar System questions and exercises with answers

Showing questions 1–30 of 64.

What share of the Solar System's total mass does the Sun hold?Read the answer and worked solution →Which nuclear process powers the Sun in its core?Read the answer and worked solution →How many planets does the Solar System have by the current definition?Read the answer and worked solution →Which four planets are the terrestrial or inner planets?Read the answer and worked solution →Which two planets are classed as gas giants?Read the answer and worked solution →The frost line of the Solar System lies at about how far from the Sun?Read the answer and worked solution →Together, Jupiter and Saturn hold nearly what share of the Solar System's non-stellar mass?Read the answer and worked solution →Which dwarf planet lies in the asteroid belt?Read the answer and worked solution →Between the orbits of which two planets does the asteroid belt lie?Read the answer and worked solution →Where is the Kuiper belt found?Read the answer and worked solution →Which moon belongs to Jupiter?Read the answer and worked solution →Which two moons are larger in size than the planet Mercury?Read the answer and worked solution →What is the boundary called where the solar wind is halted by the interstellar medium?Read the answer and worked solution →Which theorized region is thought to be the source of long-period comets?Read the answer and worked solution →Which type of star is the Sun?Read the answer and worked solution →What is the solar wind made of?Read the answer and worked solution →Which planet is the smallest in the Solar System?Read the answer and worked solution →Venus has a whitish atmosphere made mainly of which gas?Read the answer and worked solution →Which gas makes up about 78 percent of Earth's atmosphere?Read the answer and worked solution →The Moon's diameter is about what fraction of Earth's?Read the answer and worked solution →What formed the large dark patches called maria on the Moon?Read the answer and worked solution →Which substance gives most of Mars its red colour?Read the answer and worked solution →What are the names of the two moons of Mars?Read the answer and worked solution →Which moon is the outer moon of Mars?Read the answer and worked solution →By what other name are the four outer giant planets known?Read the answer and worked solution →The Great Red Spot, a giant storm, is found on which planet?Read the answer and worked solution →Which of these is one of the four Galilean moons?Read the answer and worked solution →Saturn's visible rings are made mostly of what?Read the answer and worked solution →Which moon is the only one in the Solar System with a substantial atmosphere?Read the answer and worked solution →Which planet is unique in orbiting the Sun on its side?Read the answer and worked solution →

Worked practice questions

What share of the Solar System's total mass does the Sun hold?

  1. About 75 percent
  2. About 90 percent
  3. About 99.86 percent
  4. About 50 percent
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Correct answer: C. About 99.86 percent

1. The Sun is by far the most massive body in the Solar System. 2. Its mass makes up 99.86 percent of the total. 3. Values like 50, 75 or 90 percent understate how little mass is left for planets and smaller bodies. _Source: Wikipedia, Solar System, Sun_

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Which nuclear process powers the Sun in its core?

  1. Carbon burned with oxygen
  2. Helium split into hydrogen
  3. Hydrogen fused into helium
  4. Iron fused into nickel
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Correct answer: C. Hydrogen fused into helium

1. The Sun is a main-sequence star. 2. Its core temperature and density let hydrogen fuse into helium, releasing energy. 3. Splitting helium or burning carbon is not the Sun's energy source. _Source: Wikipedia, Solar System, Lead section_

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How many planets does the Solar System have by the current definition?

  1. Seven
  2. Nine
  3. Ten
  4. Eight
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Correct answer: D. Eight

1. The Solar System has eight planets. 2. Pluto is now classed as a dwarf planet, so nine is incorrect. 3. Seven and ten do not match any current count. _Source: Wikipedia, Solar System, Lead section_

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