soil

Soil is formed when ________ are broken down by weather, water, and living things over a period of time.

• trees

• rocks

• insects

• animals

What layer of soil is below humus? ​ (a)  

• topsoil
• subsoil
• bedrock
• humus

Sand, clay, humus and _______ make up soil.

• fungi

• leaves

• gold

• silt

What layer of soil is below topsoil? ​ (a)  

• subsoil
• bedrock
• humus
• topsoil

__________ occurs due to both living things,

weather and water breaking down rocks to create soil.

• topsoil

• nutrients

• weathering

• bedrock

Soil is a _________ resource.

• natural

• human

• capital

What is the bottom layer of soil?​ (a)  

• bedrock
• subsoil
• silt
• humus