Keeping Time with the Skies — Important Questions
CBSE · Class 8 · Science
44 important questions from Keeping Time with the Skies for CBSE Class 8 Science, with answers. Part of the CBSE Class 8 Science syllabus.
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Important Questions from Keeping Time with the Skies
Which of the following are correct about the new Moon day?
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The Moon is not visible from Earth, It is also called Amavasya, The Moon appears closest to the Sun in the sky, Only the non-illuminated side faces Earth
On new Moon day (Amavasya), the Moon is between Earth and Sun, so only its dark side faces us, making it invisible. It appears closest to the Sun in our sky.
The period when the bright part of the Moon decreases is called the _____ period.
True or False: Lunar eclipses cause the phases of the Moon.
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False
False. Lunar eclipses do not cause Moon phases. Moon phases are caused by different portions of the illuminated Moon being visible from Earth. Lunar eclipses are rare events when Earth's shadow falls on the Moon.
Which of the following are characteristics of lunar calendars?
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They are based on the Moon's phases and use a month of nearly 29.5 days, Twelve lunar months add up to about 354 days
Lunar calendars are based on the Moon's phases, and one lunar month is about 29.5 days. Twelve lunar months add up to 354 days, which is about 11 days shorter than the solar year. Because of this, the seasons do not stay synchronised with the same lunar months from year to year.
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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