Tundra Soil CCEA AS Unit 2

What restricts soil development and depth in permafrost regions?

• Restricted biological activity

• High acidity levels

• Lack of oxygen in waterlogged conditions

• Low temperatures

Evie, Ava, and Freya are studying the permafrost regions for their geography project. They are trying to understand what limits the volume of humus in these regions. What could be the reason?

• Lack of litter on the soil

• Slow decomposition

• High acidity levels

• Low temperatures

What leads to the accumulation of organic matter in permafrost regions?

• Low temperatures

• High acidity levels

• Restricted biological activity

• Lack of oxygen in waterlogged conditions

What restricts the development of soil micro-organisms in permafrost regions?

• Low temperatures

• High acidity levels

• Lack of oxygen in waterlogged conditions

• Restricted biological activity

What causes waterlogged conditions in permafrost regions during summer?

• Restricted biological activity

• High acidity levels

• Low temperatures

• Sub-surface permafrost layer

During a field trip to a permafrost region, Aarav, Grace, and Noah observed that evaporation and transpiration rates were reduced. What could be the reason for this?

• High acidity levels

• Low temperatures

• Waterlogged conditions

• Sub-surface permafrost layer

What contributes to the acidity of the soil in permafrost regions?

• High water table

• Thick peat layer

• Acidic bedrock

• Lichens secretion

What secretes acid and influences pH levels in permafrost regions?

• High water table

• Thick peat layer

• Acidic bedrock

• Lichens

What restricts plant diversity and growth in permafrost regions?

• Restricted biological activity

• High acidity levels

• Lack of oxygen in waterlogged conditions

• Low temperatures

What restricts the release of nutrients in permafrost regions?

• Restricted biological activity

• High acidity levels

• Lack of oxygen in waterlogged conditions

• Low temperatures