Early humans observed the Moon’s phases and used its regular 29–30 day cycle to track time. These observations led to lunar calendars, helping them plan farming, festivals and navigation long before modern clocks existed. Class 8 NCERT Science Curiosity Chapter 1 ...
Discussion Forum Latest Questions
Moon phases depend on the relative positions of the Earth, Moon and Sun. As the Moon orbits Earth, the amount of its lit side that we see changes, creating phases like new moon, crescent, half and full moon. Class 8 NCERT ...
The Moon reflects sunlight because it doesn’t shine on its own. Its phases occur due to changes in how much of its lit side we see from Earth as it moves around our planet in its orbit. Class 8 NCERT Science ...
A smooth surface reflects light evenly, creating clear images like in mirrors. A rough surface scatters light in different directions, so no clear image forms. This is why polished metal reflects better than paper or stone. Class 8 Science Curiosity Grade ...
Corrective glasses use lenses to bend light rays so they focus properly on the retina. For nearsighted or farsighted people, glasses adjust how light enters the eyes, helping form clear images instead of blurry ones. Class 8 Science Curiosity Grade 8 ...