Tiêu đề Class 6 Science Chapter 12- Beyond Earth Book Solution with notes.pdf ✅

Class VI Science (Curiosity) Book Solution with Key Notes/Points ©kvsecontent.com Chapter 12- Beyond Earth Key Notes Stars ▪ A luminous spherical object that produces its own light and heat ▪ The Sun is our closest star ▪ Stars appear as bright points in the night sky ▪ Some stars form patterns called constellations Constellations ▪ Groups of stars that appear to form recognizable patterns ▪ Traditionally used for navigation and storytelling ▪ Officially divided into 88 regions by the International Astronomical Union (IAU) ▪ Examples include Orion (imagined as a hunter) and the Big Dipper Planets ▪ Large, nearly spherical objects that revolve around the Sun ▪ Eight planets in our Solar System (in order from the Sun): 1. Mercury 2. Venus 3. Earth 4. Mars 5. Jupiter 6. Saturn 7. Uranus 8. Neptune Satellites ▪ Objects that orbit a larger celestial body ▪ Can be natural (like moons) or artificial (human-made) ▪ Serve various purposes like communication, navigation, and scientific research Natural Satellites ▪ Objects that move around planets are commonly called satellites. ▪ Moons are natural satellites of planets.

Class VI Science (Curiosity) Book Solution with Key Notes/Points ©kvsecontent.com New Moon (Amavashya)- A new moon is when the moon is between the sun and the Earth. The side of the moon that is lit by the sun is facing away from us, so we can’t see it. Night Sky Watching ▪ Best viewed from dark, open areas with minimal light pollution ▪ Some constellations and planets visible to naked eye ▪ Telescopes and binoculars help see distant objects more clearly Indian Context ▪ Ancient Indian astronomy used terms like: o Nakṣhatra for stars/star groups o Sanskrit names for planets ▪ India's space missions like Chandrayaan have explored the Moon Interesting Facts ▪ Venus is the brightest planet after the Sun and Moon ▪ Mars is called the Red Planet due to its reddish soil ▪ Earth is called the Blue Planet due to its water-covered surface ▪ The search for extraterrestrial life continues, focusing on exoplanets Key Terms Light Pollution ▪ The excessive or inappropriate use of artificial light at night ▪ Reduces visibility of stars and celestial objects ▪ Negatively impacts both human observation and natural ecosystems Astronomical Unit (AU) ▪ A unit of measurement representing the average distance between the Earth and the Sun ▪ Approximately 150 million kilometres ▪ Used to measure distances within the Solar System Moon (not visible) Earth
Class VI Science (Curiosity) Book Solution with Key Notes/Points ©kvsecontent.com Rotation ▪ The spinning of a planet or celestial body around its own axis ▪ Earth takes about 24 hours to complete one rotation ▪ Causes day and night cycle Revolution ▪ The movement of a planet or celestial body around another body (like a planet around the Sun) ▪ Earth takes nearly one year to complete one revolution around the Sun Exoplanets ▪ Planets that orbit stars other than our Sun ▪ Currently being studied in the search for potential extraterrestrial life ▪ Located in other solar systems within the Milky Way Galaxy Crater ▪ Circular, bowl-like depression on a planetary or lunar surface ▪ Typically formed by asteroid or meteorite impacts ▪ Prominently visible on the Moon's surface due to lack of atmospheric erosion Galaxy ▪ A massive, gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter ▪ Comes in various shapes like spiral, elliptical, and irregular ▪ The Milky Way is a spiral galaxy Planets Classification ▪ Divided into two main types: 1. Inner/Terrestrial Planets (Mercury, Venus, Earth, Mars) ▪ Smaller, rocky surfaces ▪ Closer to the Sun 2. Outer/Gaseous Planets (Jupiter, Saturn, Uranus, Neptune) ▪ Larger, composed mostly of gases ▪ Have ring systems ▪ Located farther from the Sun