Renee+Earth

Earth ﻿The Earth is made up of three parts: The Crust - a thin outer layer of rocks that is less than 100 km deep,The Mantle - made up of rocks that are more dense (more stuff in them) Than the crust,The Core - a dense ball of metal.The outer part of the core is liquid metal. It's the motion of this metal spinning around that gives the Earth is magnetic field (makes the Earth a big magnet). The inner part of the core is solid metal.The Moon is about 149,600,000 km away from the sun and its mass is about 5,980,000,000,000,000,000,000,000 kg. **Leap years** Every body wants to know why there are leap years and so do I. So I fould out. The length of time it takes to orbit the sun is 365 and a quarter days. To make up for the extra quarter we have a leap year, every four years. media type="youtube" key="7NYRVsKAkFM?fs=1" height="246" width="309" align="right" As we all know Earth has seasons but why, well Earth rotates and relolves around the sun so in Summer, the northern hemishere receives sunlight that is more direct than it is in Winter, and in Summer there are more hours of daylight because of DST
 * Why does Earth have seasons? **

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