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Olympiad (Class 9) Astronomy — practice by topic

Browse 30 questions across 3 Astronomy topics. Choose what you want to revise, then open a question to check its answer and worked solution.

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Astronomy topics

Astronomy (30)Earth Moon and Sky (30)Olympiad Astronomy (30)

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A student claims summer comes because Earth is nearer the Sun. The real cause is Earth's:Read the answer and worked solution →Earth's axis is tilted from the upright by an angle of about:Read the answer and worked solution →The latitude at which the Sun is directly overhead on the summer solstice is the Tropic of:Read the answer and worked solution →On the summer solstice, the day length reaches 24 hours at and beyond the:Read the answer and worked solution →

Worked practice questions

A student claims summer comes because Earth is nearer the Sun. The real cause is Earth's:

  1. Axial tilt
  2. Axial speed
  3. Orbit size
  4. Orbit shape
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Correct answer: A. Axial tilt

1. Distance to the Sun changes only slightly through the year. 2. The angle of sunlight changes a great deal instead. 3. So seasons come from the axial tilt. _Source: OpenStax Astronomy 2e, Chapter 4, Earth, Moon, and Sky._

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Earth's axis is tilted from the upright by an angle of about:

  1. 43 degrees
  2. 23 degrees
  3. 13 degrees
  4. 33 degrees
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Correct answer: B. 23 degrees

1. The tilt sets how far the Sun swings north and south. 2. That tilt has a fixed measured value. 3. It is about 23 degrees. _Source: OpenStax Astronomy 2e, Chapter 4, Earth, Moon, and Sky._

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The latitude at which the Sun is directly overhead on the summer solstice is the Tropic of:

  1. Cancer
  2. Cygnus
  3. Corvus
  4. Crater
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Correct answer: A. Cancer

1. One named parallel marks the Sun's farthest north point. 2. It matches the value of Earth's tilt. 3. That parallel is the Tropic of Cancer. _Source: OpenStax Astronomy 2e, Chapter 4, Earth, Moon, and Sky._

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