A comet - is made from ice, dust and rock., A meteorite - reaches the ground on Earth., A meteor - burns up in Earth's atmosphere., The Earth orbits the Sun - in 365 days., The Earth spins on its axis - in 24 hours., A natural satellite of the Earth is - the Moon., An artificial satellite of the Earth is - the ISS (International Space Station)., The Asteroid Belt is located - between Mars and Jupiter., What galaxy is Earth located in? - The Milky Way., What is a galaxy? - A collection of billions of stars, gas, dust and planets., Name the four inner planets. - Mercury, Venus, Earth and Mars., What does 'terrestrial planet' mean? - Planets made of rock., What are the gas giants? - The outer planets which are made of gas, namely Uranus, Neptune, Jupiter, Saturn., What force keeps the planets orbiting the Sun. - Gravity., Venus is closer to the Sun than Mercury, but gets hotter. Why? - Its atmosphrere contains carbon dioxide, which traps heat, making it warmer., In which phase of the Moon is the part of the Moon seen from Earth in complete darkness? - The new Moon., What is the umbra? - During a Solar eclipse, the area on the Earth completely blocked by the Sun, so in darkness., In the winter, is the Sun higher or lower in the sky than in winter? - Lower,

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