Exam 4: The Terrestrial Environment

In temperate deciduous forest,light penetration to the ground is greater during summer than during winter.

When the amount of water in a soil exceeds what the pore space can hold,the soil is ________.

Each of the following is a challenge faced by a terrestrial plant except

Ions carrying a positive charge are cations.

Entisols are immature soils associated with recently deposited sediments.

Dark clay soils that show significant expansion and contraction due to wetting and drying are referred to as

Microorganisms contribute to the formation of soils.

In the temperate regions of the world,many forest tree species are ________,shedding their leaves during the winter months.

A collection of natural bodies of earth,composed of mineral and organic matter and capable of supporting plant growth,is referred to as ________.

A waxy layer coating the aerial parts of most plants,such as stems and leaves,which reduces water loss is referred to as the

In forests,most of the organic matter that enters the soil comes from plant roots.

All the following factors affect the attenuation of light in water,except

The greater the depth of water percolation,the greater the depth of weathering and soil development.

As soil acidity increases,the concentration of ________ increases.

Distinct layers in the soil that are created by localized chemical and physical processes are called ________.

Soils rich in iron oxide are

Organisms that live in aquatic systems experience limited temperature fluctuations due to water's

Generally,an ion with a ________ positive charge and ________ size will bind most strongly to a soil particle.

Under which conditions are the processes of weathering,leaching,and input of organic material from plants into soil maximized?

An E horizon is more likely to develop in grassland soils than in forest soils.