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You are an Earth sign. What is Earth?
Earth is the third planet from the Sun and the fifth largest. If you completed the exercise at http://integratelearning.org/astrotask/ariesmath.htm, you measured the distance of all the planets from the Sun!
The Earth is divided into several layers. Each layer has different chemical and seismic properties. Following are the depths of each, shown in x10^24 kilograms.
The crust cahnges a lot in thickness from one place to another. It is thinner under the oceans and thicker under the continents. The inner core and crust are solid; the outer core and mantle layers are plastic or semi-fluid.
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!. How thick is the transition region in x10^24 kilograms?
2. How thick are the inner and outer core regions together in x10^24 kilograms?
3. Which is the thickest layer?
4. Which is the thinnest layer?
As a whole, the substance (chemical composition) of the Earth is as follows:
5. How much more iron does Earth have than nickel?
6. How much less titanium does Earth have than oxygen?
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