Earth & Space

2. The part of the Earth between the crust and the core.
3. The boundary layer between the earth's crust and mantle whose depth varies from about 3 miles (5 kilometers) beneath the ocean floor to about 25 miles (40 kilometers) beneath the continents.
4. Fused or liquefied by heat.
8. A continent is one of Earth's seven main divisions of land. The continents are, from largest to smallest: Asia, Africa, North America, South America, Antarctica, Europe, and Australia. 4 - 12+ Earth Science, Geography, Geology, Physical Geography.
12. Perovskite is a calcium titanium oxide mineral composed of calcium titanate. Its name is also applied to the class of compounds which have the same type of crystal structure as CaTiO₃, known as the perovskite structure.
13. A substance composed of the chemical elements hydrogen and oxygen and existing in gaseous, liquid, and solid states.
14. Tend to meet at a point.
15. The rigid outer part of the earth, consisting of the crust and upper mantle.
17. Small rocky objects that orbit the Sun

1. A concept proposing that the planet Earth is entirely contains a substantial interior space.
3. Geologic Material means naturally occurring matter derived from or consisting of rock and sediment.
5. The envelope of gasses surrounding the earth or another planet.
6. Relating to earthquakes or other vibrations of the earth and its crust.
7. A supercontinent that incorporated almost all the landmasses on Earth.
8. The outermost shell of a terrestrial planet.
9. The movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
10. The upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur.
11. Relating to the structure of the earth's crust and the large-scale processes which take place within it.
16. The innermost part of the earth.
17. Metallic substance composed of two or more elements as either a compound or a solution.