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F. Answer the following questions.
1. Is there any life on the moon? If no, why?
2. Describe the surface of the moon.
3. How are tides caused? What do you understand by low tide and high tide?
4. When does an eclipse occur?
5. Why are eclipses sometimes total and at other times partial?
Answers
Answer:
1.Moon is a natural satellite of earth but life on the moon is not possible as on the earth because of many reasons. Firstly, there is no water on the moon, which is the first and foremost requirement for the life. Life first started on the earth because of water and if no water we can imagine no life.
2.The moon's surface is covered with dead volcanoes, impact craters, and lava flows, some visible to the unaided stargazer.
3.High and low tides are caused by the moon. The moon's gravitational pull generates something called the tidal force. The tidal force causes Earth—and its water—to bulge out on the side closest to the moon and the side farthest from the moon. These bulges of water are high tides.
4.solar eclipse occurs when the moon gets between Earth and the sun, and the moon casts a shadow over Earth. A solar eclipse can only take place at the phase of new moon, when the moon passes directly between the sun and Earth and its shadows fall upon Earth's surface.
5.Eclipse is sometime full and sometime partial because the moon's orbit around the earth is not perfect. If the earth is in moon umbra when it covers the earth, you will see full solar eclipse but if earth is in moon's penumbra then you will see partial solar eclipse and same is with lunar eclipse.
Explanation: