TMA1/BIO408

TMA Quiz Questions TMA: TMA1/BIO408 Matric Number:  SCORE=8.50 BIO408 - Soil Ecology Dr. Olaniyi Omolara (oolaniyi@noun.edu.ng ) 1 Soil quality determines the following except  the nature of plant ecosystems the capacity of land to support animal life the profile of the soil the capacity of land to support society and human activities 2 Soil formation is not controlled by soil capacity  climate topography parent materials 3 A set of soils whose formation was dominantly influenced by time are referred to as lithosequence chronosequence biosequence timosequence 4 An example of metamorphic rock is ____ while an example of sedimentary rock is ____ marble; mudstone sandstone; mudstone granite; basalt marble; granite 5 Precipitation and temperature both affect the rate of processes in soil except mechanical physical  biological chemical 6 The activities of soil flora and fauna potentially enhance the following except soil aggregate stability nutrient cycling organic matter soil liming 7 Animals that bore tunnels in the soil enhance movement of water and air into soil's subsurface layers. Which of the following animals cannot be classified among this group of soil borers? earthworms bats bush rats  moles 8 Leaching of soil mineral and erosion of surface soil could be slowed down by natural vegetative cover nothing temperature animal population 9 Soil forming processes take time to show their effects because time waits for no one time does not interact with soil topography time interacts with the other factors of soil formation time interact with soil lora and fauna alone 10 Slopes generally allow rainfall to enter the soil without running off allow less rainfall to enter the soil before running off allow too much rainfall to enter the soil before running off enhance soil formation 11 Rapid loss of soil by erosion is pronounced on flat soil clay slopes topography 12 Physical disintegration breaks down rock sequentially. Which is the correct sequence in the formation? silt particles --- smaller rocks --- sand sand --- silt particles --- smaller rocks particulates -- smaller rocks --- sand --- silt particles smaller rocks --- sand --- silt particles 13 Physical weathering is brought about by the following except abrasion by water ice and wind oxygen temperature 14 Which of the following is not a factor that governs chemical weathering? Carbonation and order acid reactions Hydrolysis Dehydration Chelation 15 Regolith is the layer of loose rock particles that covers the bedrock of land parent material rock small rock pieces 16 Soil formation processes do not involve Translocations Transfers Transformations Additions and losses 17 ____ occurs when soil constitutions are chemically or physically modified or destroyed and others are synthesized from the precursor materials Transfers Translocations Additions Transformations 18 Soil taxonomy refers to epipedon soil classification system mollicepipedon Umbricepipedon 19 What is the Ochricepipedon? It is a mineral surface horizon noted for its dark colour due to accumulated organic matter. It is a mineral horizon that is very black in colour due to its high organic matter content.  It is a mineral horizon that is either too thin, too light in colour, or too low in organic matter to be either a mollic or umbric horizon It is a 20- to 60-cm-thick layer of peat or muck with a black to dark brown colour and very low in density formed in wet areas. 20 The sombic horizon is the kandic horizon and has an accumulation of Fe and Al oxides as well as low activity silicate clays the horizon that containa an accumulation of carbonates (CaCo3) that often appear as white chalklike nodules. an illuvial horizon, dark in colour because of high organic matter accumulation. Aridic