Soil

Soil is ..............................

• Dirt

• Where plants grow

• Weathered rock fragments

In soil there is _____________ of water

In soil there is _____________ of mineral content

• 25%

• 5%

• 45%

In soil there is _____________ of air

• 45%

• 25%

• 5%

Soil consist of :

• soil organisms

• humus

• inorganic particles

• water

• only unweathered rock

In soil the air present comes from.....................

• the atmosphere

• respiration of soil organisms.

• the atmosphere and from respiration of soil organisms.

• water

Water present in soil comes from.......................

• rainfall or irrigation.

• air

• drains

• watering plants

Organic matter is formed when..............................

• dead animals

• rotten plants

• decompostion of the remains of plant and animal remains.

• plants and animals

The inorganic matter content of soil is formed from

• inorganic material

• breakdown of rocks

• organic matter

• rocks

Factors of soil formation are

• Climate

• Human influence

• Biotic factors

• Parent material

• Time