C. Answer these questions. 1. Name the eight planets of the solar system. 2. What is a satellite? 3. Explain the layers of Earth. 4. What is revolution? 5. Why is it winter in India when it is summer in Australia?
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1.Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
2. satellite is an object in space that orbits or circles around a bigger object. There are two kinds of satellites: natural (such as the moon orbiting the Earth) or artificial (such as the International Space Station orbiting the Earth).
3.Broadly speaking, the Earth has four layers: the solid crust on the outside, the mantle and the core — split between the outer core and the inner core.
The crust
The crust is everything we can see and study directly. The thinnest layer of the Earth, the crust still measures about 40 km on average, ranging from 5–70 km (~3–44 miles) in depth.
The mantle extends down 2,890 km, making it the thickest layer of Earth. It makes up about 84% of Earth’s volume. Everything we know about the mantle we know indirectly, as no human study managed to go beyond the crust. Most of the things we know about the mantle we know from seismologic studies
The “solid” inner core has a radius of ~1,220 km, while the “liquid” outer core extends up to a radius of ~3,400 km.
4.Revolution" refers the object's orbital motion around another object. For example, Earth rotates on its own axis, producing the 24-hour day. Earth revolves about the Sun, producing the 365-day year. A satellite revolves around a planet.
5. India is in the northern hemisphere and Australia is in the southern hemisphere so when southern hemisphere is facing the sun the northern hemisphere is away from the sun.So there is summer in Australia and Winters in India.
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Ever since the Big Bang, the Universe has been drifting and expanding. The birth and death of stars leave an aftermath of galaxies, planets, and even living organisms.
Watch the Earth transform from a violent, molten rock to a supporter of life. Discover how astronomers use collective learning to put our planet in its proper place. And learn about Earth's drifting surface that causes earthquakes, volcanic eruptions, and continental "surfing."