A
This is the top layer of soil, made of dead leaves and plants.
Horizon O
This layer is called topsoil and is good for plant growth.
Horizon A
This layer has minerals and is below the topsoil.
Horizon B
This is the way a mineral reflects light, making it shiny or dull.
luster
This is the color of the powdered mineral when it is rubbed on a surface.
streak
This describes how a mineral breaks, either in smooth, flat surfaces or rough, uneven pieces.
fracture
This type of rock is made from cooled and solidified lava or magma.
Igneous Rock
This type of rock is made from layers of sand, mud, or other materials.
Sedimentary Rock
This type of rock is formed when other rocks are changed by heat or pressure.
Metamorphic Rock
What are the main components of soil?
There are the air, water, mineral particles and organic matters.
Give me 2 examples of fossil fuels.
- petroleum
- coal
- natural gas
How many soil profiles are there?
There are four main soil profiles: