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- UMO
  Unicus Mathematics Olympiad (UMO)
  
  Syllabus (Year 2026-27)
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Class 11
  
  Sample Papers (Year 2026-27)
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Class 11
  
  Exam Date:
  
  Jul 14, 2026 / Jul 29, 2026
  
  Awards
  
  Marking Scheme
  
  How to Participate
  
  Ranking Criteria
  
  About UMO
  
  Olympiad Preparation
  
  FAQs
  USO
  Unicus Science Olympiad (USO)
  
  Syllabus (Year 2026-27)
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Class 11
  
  Sample Papers (Year 2026-27)
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Class 11
  
  Exam Date:
  
  Jul 11, 2026 / Jul 25, 2026
  
  Awards
  
  Marking Scheme
  
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  Ranking Criteria
  
  About USO
  
  Olympiad Preparation
  
  FAQs
  UEO
  Unicus English Olympiad (UEO)
  
  Syllabus (Year 2026-27)
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Class 11
  
  Sample Papers (Year 2026-27)
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Class 11
  
  Exam Date:
  
  Jul 10, 2026 / Jul 22, 2026
  
  Awards
  
  Marking Scheme
  
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  About UEO
  
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  UGKO
  Unicus General Knowledge Olympiad (UGKO)
  
  Syllabus (Year 2026-27)
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Class 11
  
  Sample Papers (Year 2026-27)
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Class 11
  
  Exam Date:
  
  Jul 8, 2026 / Jul 15, 2026
  
  Awards
  
  Marking Scheme
  
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  Ranking Criteria
  
  About UGKO
  
  Olympiad Preparation
  
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  UCTO
  Unicus Critical Thinking Olympiad (UCTO)
  
  Syllabus (Year 2026-27)
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Class 11
  
  Sample Papers (Year 2026-27)
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Class 11
  
  Exam Date:
  
  Jul 9, 2026 / Jul 18, 2026
  
  Awards
  
  Marking Scheme
  
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  Ranking Criteria
  
  About UCTO
  
  Olympiad Preparation
  
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  UGMO
  Unicus Global Mathematics Olympiad (UGMO)
  
  Syllabus (Year 2026-27)
  
  Class KG
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Sample Papers (Year 2026-27)
  
  Class KG
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Exam Date:
  
  Jan 16, 2027 / Jan 28, 2027
  
  Awards
  
  Marking Scheme
  
  How to Participate
  
  Ranking Criteria
  
  About UGMO
  
  Olympiad Preparation
  
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  UGSO
  Unicus Global Science Olympiad (UGSO)
  
  Syllabus (Year 2026-27)
  
  Class KG
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Sample Papers (Year 2026-27)
  
  Class KG
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Exam Date:
  
  Jan 14, 2027 / Jan 23, 2027
  
  Awards
  
  Marking Scheme
  
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  About UGSO
  
  Olympiad Preparation
  
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  UGEO
  Unicus Global English Olympiad (UGEO)
  
  Syllabus (Year 2026-27)
  
  Class KG
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Sample Papers (Year 2026-27)
  
  Class KG
  
  Class 1
  
  Class 2
  
  Class 3
  
  Class 4
  
  Class 5
  
  Class 6
  
  Class 7
  
  Class 8
  
  Class 9
  
  Class 10
  
  Exam Date:
  
  Jan 09, 2027 / Jan 20, 2027
  
  Awards
  
  Marking Scheme
  
  How to Participate
  
  Ranking Criteria
  
  About UGEO
  
  Olympiad Preparation
  
  FAQs
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How does Earth's rotation cause day and night?

The Earth spins around like a top. This spinning is called rotation.
As the Earth rotates, different parts of it face the Sun and get light.
When your part of the Earth is facing the Sun, it is daytime.
When your part of the Earth turns away from the Sun, it is nighttime.

Examples:

When you wake up in the morning, your side of the Earth is facing the Sun, and it is bright outside.
At nighttime, when the Sun goes down, your side of the Earth is turned away from the Sun, and it gets dark.
As you watch the sunset, it means your place on Earth is moving into nighttime.

Fun Fact: The Earth takes about 24 hours to complete one full spin. That is why we have a day and a night every 24 hours!

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