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Maharashtra State BoardSSC (English Medium) 5th Standard
Textbook Solutions8143
Concept Notes & Videos216
Syllabus

Sunset and sunrise

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Topics

  • Activity 1
  • Activity 2
  • Sunset and sunrise

Activity 1

To understand how the Earth's rotation causes day and night.

  • Place a candle in the centre of a table to represent the sun and keep the room dark.
  • Position a globe around the candle, representing the Earth.
  • Light the candle and observe how one side of the globe is lit (day) while the other remains dark (night).
  • Slowly rotate the globe anticlockwise (west to east) and notice how different areas move into the light (sunrise) and out of the light (sunset).
  • This movement shows how the Earth’s rotation causes the cycle of day and night for different places on the planet.

Activity 2

To understand how the Earth's rotation determines a day, with its parts being daytime and nighttime, and how we measure time.

  • Place a candle in the centre of a table to represent the sun and keep the room dark.
  • Position a globe around the candle and stick a red bindi on it to mark a location on Earth.
  • Light the candle and observe how one side of the globe is lit (daytime) while the other side remains dark (nighttime).
  • Slowly rotate the globe anticlockwise (west to east) and notice how the red bindi moves into the light (sunrise), then directly faces the candle (noon), and later moves out of the light (sunset).
  • A full rotation of the globe brings the bindi back to its starting position, representing one full day (24 hours).
  • This shows that a day has two parts: daytime (when the location is in light) and nighttime (when it is in darkness).
  • The Earth's rotation is responsible for the continuous cycle of day and night.

Day and night on the globe

Sunset and sunrise:

Sunrise happens when the sun appears to rise in the sky in the morning, and sunset occurs when the sun seems to go down in the evening. But scientifically, the sun doesn't actually move up or down. Instead, these events happen because the Earth is rotating.

  • Earth's Rotation: The Earth spins around an axis, which is an imaginary line. It takes about 24 hours for the Earth to complete one full spin, which gives us day and night.
  • Sunrise: A sunrise occurs when Earth's surface turns towards the sun, marking the start of the day. As the sun rises, the sky gradually brightens, marking the beginning of the day.
  • Sunset: The Earth's rotation causes the Earth's part to turn away from the Sun, resulting in sunset, the start of night, and the sky gradually getting darker as the Sun sets.
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