Soil and rocks

3. Igneous dark and highly dense rock. Low in silica, but high in iron and magnesium.
6. Darkest soil inhabited by many living organisms.
7. Sedimentary rock formed from sediment that comes from the decomposition and fragmentation of preexisting rocks.
10. Outermost and thinnest layer of the Earth.
12. Type of soil formed after thousands of years. It contains all the horizons (A, B, C, and bedrock).
13. Metamorphic rock which presents minerals organized into new crystaline structures without bands or fractures.
14. Igneous rock formed when magma erupts to the surface as lava and quickly cools.
15. The size, shape, and pattern of the grains in rocks.

1. Originated when the rocks are subjected to conditions of high pressure and temperature, while remaining in solid state.
2. Type of metamorphism caused by large masses of rock that come under extreme conditions of pressure and temperature.
4. Result from the cooling and solidification of magma.
5. Formed through accumulation and compaction of fragments of rocks and remains of living organisms.
8. Geological process caused through the effect of the wind, water, glaciers, among others.
9. Type of soil composed by bedrock and a mineral layer (C horizon).
11. Process by which wind, rain, ice, or water currents break rocks into fragments, wear them down, and transport them from one place to another, where they accumulate.
16. Natural aggregate of many types of minerals.