Review

S M U 1 R F S

The leftover plant and animal matter is called ( ) humus

A layer of soil differing from the layers above and below it is called ( ). horizon

1 point!

A horizon is made up of ( ). This is the top layer of soil. topsoil

The B horizon is known as ( ). This is normally a fairly hard layer. subsoil

The soil horizons make up a ( ) The soil horizons make up a ( ). This is a vertical section of soil from the surface down to bedrock. Soil profile

( ) is a mixture of tiny rock particles, minerals, humus, water, and air. Soil