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Keeping Time with the Skies

Science · Class 8 · All

ScienceClass 8AllMedium
Q1/15
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Which instrument replaced sundials for measuring time more accurately?

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All 15 questions in this quiz

  1. Why were observations of the sky important for ancient civilizations?

    1. Only for entertainment
    2. To predict seasons, measure time, and plan farming
    3. To build roads only
    4. To produce electricity

  2. Which of the following is a natural satellite?

    1. Mars
    2. Moon
    3. Sun
    4. Mercury

  3. Indian Standard Time (IST) is based on which longitude?

    1. 0 degrees
    2. 82.5 degrees East
    3. 90 degrees East
    4. 180 degrees

  4. What causes the different phases of the Moon?

    1. Earth's shadow falling on the Moon every day
    2. The Moon's changing distance from Earth
    3. Different portions of the Moon's sunlit surface become visible
    4. Clouds covering the Moon

  5. Which direction does the Sun appear to rise?

    1. North
    2. South
    3. East
    4. West

  6. Which calendar is mainly based on the Earth's revolution around the Sun?

    1. Solar calendar
    2. Lunar calendar
    3. Tidal calendar
    4. Weather calendar

  7. Why do different places on Earth experience different local times?

    1. Earth is flat.
    2. Earth rotates on its axis.
    3. Moon changes shape.
    4. Clouds block sunlight.

  8. Which instrument replaced sundials for measuring time more accurately?

    1. Water clock
    2. Telescope
    3. Compass
    4. Microscope

  9. Which celestial body revolves around the Earth?

    1. Sun
    2. Moon
    3. Mars
    4. Venus

  10. The time taken by the Earth to complete one revolution around the Sun is approximately:

    1. 24 hours
    2. 30 days
    3. 365 1/4 days
    4. 12 months exactly

  11. Which phase occurs when the entire illuminated part of the Moon is visible from Earth?

    1. New Moon
    2. Full Moon
    3. Crescent Moon
    4. Half Moon

  12. Which movement of the Earth is responsible for day and night?

    1. Revolution around the Sun
    2. Rotation on its axis
    3. Movement of the Moon
    4. Earth's orbit around Jupiter

  13. The Earth completes one rotation on its axis in approximately:

    1. 12 hours
    2. 24 hours
    3. 30 days
    4. 365 days

  14. A sundial measures time by using:

    1. Rainfall
    2. Shadows cast by the Sun
    3. Wind speed
    4. Moonlight

  15. Ancient people mainly used which celestial object to estimate time during the day?

    1. Moon
    2. Sun
    3. Venus
    4. Jupiter