Soils Level 1 Prove Mastery

As a farmer you would be most concerned with the quality of soil in the

• o horizon
• a horizon
• e horizon
• r horizon

This horizon is composed primarily of mineral material with very little organic matter

• O horizon
• A horizon
• E horizon
• B horizon

Clay soils have a higher porosity and drain the quickest.

• true
• false

Metamorphic rock forms directly from magma

• true
• false

Physical weathering is the breakdown of rock by chemical reactions

• true
• false

Porosity is how quickly the soil drains and depends on texture.

• true
• false

Soil acts as a filter for pollutants

• true
• false

The texture of soil is determined by the percentage of sand, silt, and clay the soil contains

• true
• false

The rock cycle is the constant formation and destruction of rock.

• true
• false

Most of the nutrients in the soil come from

• chemical weathering
• decompostion
• mechanical weathering
• erosion