Astronomy: Differentiation

1. certain metals chemically _______ to low-density minerals in the crust and do not differentiate
3. an example of an asteroid that is large enough to be differentiated
8. this type of element releases heat into a planet through an atomic decay process
9. many of these objects are too small to be differentiated
10. lighter portions of the Moon's surface are made of this feldspar rich rock
11. a common rock on the surface of Earth formed by plate tectonics processes in association with water
12. provides a force that can separate materials that make up a planet into layers
13. a body orbiting a star that is too small to generate nuclear reactions in its core
15. a region of intermediate density surrounding the core

1. a volcanic rock that contains feldspar, and makes up the dark portions of the Moon's surface
2. separating mixed materials by their density
4. the energy of motion that can be converted into heat during planet formation
5. a common, low-density mineral in the crust that helps provide evidence for differentiation
6. a layer of lower density material that is found at the surface of a planet
7. energy that is essential for differentiation
14. a high-density, metallic region at the center of a planetary body