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Class 4 The World Around Us — Our sky

Follow the Sun across a day and the Moon across a month, read a shadow for the time of day, and say which festivals are set by a full Moon and which by a dark sky.

Name: ________________________

  1. 1.Ancient people worked out that a shadow could tell you the time, and built a device to do it. What is that device called?

  2. 2.What happens to a shadow when the direction of the light changes?

    • a) Nothing changes until the light is moved closer
    • b) The direction of the shadow changes too
    • c) The shadow gets longer but stays where it was
    • d) The shadow becomes fainter

  3. 3.Match each name to what it means.

    • Poornima
    • Amavasya
    • Samrat Yantra
    • The sundial at Jantar Mantar
    • The full Moon, a complete circle
    • The new Moon, when it cannot be seen

  4. 4.Here is the same pole at three times of one day. Tap the shadow it casts at noon.

    Write the number of the part.

    123

  5. 5.Sort each festival by the Moon the chapter says it is celebrated on.

    Groups: The night with no Moon · The night of the full Moon · The first night the Moon shows after a new Moon

    • Rakshabandhan
    • Guru Poornima
    • Buddha Poornima
    • Diwali
    • Eid

  6. 6.The shape of the Moon changes from night to night in a pattern. What did ancient cultures make out of that?

    • a) They kept count of the days with it, which gave rise to the earliest calendars
    • b) They used it to find directions at night
    • c) They used it to decide when to sleep
    • d) They used it to predict the weather for the season

  7. 7.Who built the Jantar Mantar, and in which cities?

    • a) Raja Jai Singh of Jaipur, in Jaipur, Ujjain, Delhi, Varanasi and Mathura
    • b) The Government of Rajasthan, in five desert cities
    • c) Raja Jai Singh of Jaipur, in Jaipur alone
    • d) Satyajit Ray, as a set for a film

  8. 8.How does the Sun appear to move through the day?

    • a) Straight up in the morning and straight down at night
    • b) From the west to overhead by noon, then towards the east
    • c) From the north to overhead, then towards the south
    • d) From the east to overhead by noon, then towards the west in the afternoon

Answer key — Class 4 The World Around Us — Our sky

  1. 1.
    • sundial
    • a sundial
    • sun dial
  2. 2. b) The direction of the shadow changes too
  3. 3. Poornima → The full Moon, a complete circle; Amavasya → The new Moon, when it cannot be seen; Samrat Yantra → The sundial at Jantar Mantar
  4. 4. 2 — The second shadow
  5. 5. Diwali → The night with no Moon; Rakshabandhan → The night of the full Moon; Guru Poornima → The night of the full Moon; Buddha Poornima → The night of the full Moon; Eid → The first night the Moon shows after a new Moon
  6. 6. a) They kept count of the days with it, which gave rise to the earliest calendars
  7. 7. a) Raja Jai Singh of Jaipur, in Jaipur, Ujjain, Delhi, Varanasi and Mathura
  8. 8. d) From the east to overhead by noon, then towards the west in the afternoon