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FAQs on Asteroids: Chapter 17 - Stars and the Solar System, Class 8, Science

1. What is the solar system?
Ans. The solar system is a collection of planets, moons, asteroids, comets, and other celestial bodies that orbit around the Sun. It includes eight planets, namely Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune, along with their moons and various other smaller objects.
2. How many stars are there in the solar system?
Ans. The solar system consists of only one star, which is the Sun. The Sun is a massive ball of hot gas that provides heat, light, and energy to all the planets and other celestial bodies in the solar system.
3. What are asteroids?
Ans. Asteroids are small rocky objects that orbit around the Sun. They are remnants from the early formation of the solar system, and most of them are found in the asteroid belt, a region located between the orbits of Mars and Jupiter. Asteroids can vary in size, ranging from small boulders to objects several hundred kilometers in diameter.
4. How are stars formed in the solar system?
Ans. Stars are formed through a process called stellar evolution. It begins with a dense cloud of gas and dust in space, known as a nebula. Gravitational forces cause the nebula to collapse, and as it contracts, the material at the core becomes denser and hotter, eventually forming a protostar. When the temperature and pressure at the core reach a certain point, nuclear fusion reactions begin, and a star is born.
5. Are all the planets in the solar system similar to Earth?
Ans. No, not all planets in the solar system are similar to Earth. Each planet has its own unique characteristics, such as size, composition, atmosphere, and surface conditions. For example, some planets like Venus have a thick, toxic atmosphere and extreme temperatures, while others like Mars have a thin atmosphere and are known for their reddish appearance. Earth is considered unique due to its suitable conditions for life, including the presence of liquid water.
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