NCERT Class 8 Science Book Curiosity Chapter11 QA
Chapter 11 : Keeping Time with the Skies Questions and Answers (1 Mark) Question: What is a day? Answer: A day is the time taken by the Earth to complete one rotation on its axis. Question: What causes day and night? Answer: Day and night are caused by the rotation of the Earth on its axis. Question: What is a year? Answer: A year is the time taken by the Earth to complete one revolution around the Sun. Question: Name the natural satellite of the Earth? Answer: The Moon is the natural satellite of the Earth. Question: What is a lunar month? Answer: A lunar month is the time taken by the Moon to complete one revolution around the Earth. Questions and Answers (2 Marks) Question: Why do we see phases of the Moon? Answer: We see phases of the Moon because the Moon revolves around the Earth, and only a part of its sunlit surface is visible from the Earth at different times. Question: What is a solar day? Answer: A solar day is the time interval between two su...