4th grade chapter 6 lesson 2 soil

nonliving plant and animal matter

• soil profile

• horizon

• humus

• topsoil

a layer of soil that differs from the layers above and below it

• soil profile

• horizon

• humus

• topsoil

a vertical section of soil from the topsoil to the bed rock

• soil profile

• horizon

• humus

• topsoil

the top layer of soil

• soil profile

• horizon

• humus

• top soil

the layer of soil that lies below the topsoil

• permeability

• subsoil

• porous

• pore spaces

the space between particles of soil

• permeability

• subsoil

• porous

• pore spaces

a material that holds air and water

• permeability

• subsoil

• porous

• pore spaces

how fast water flows through a substance

• permeability

• subsoil

• porous

• pore spaces

One thing soil is made up of is small rock particles.

• True

• False

One thing soil is made up of is humus.

• True

• False