How do the strength and cohesion of clay-rich regolith or soil change with the addition of water?
select one:
a. water does not affect cohesion but lowers strength.
b.
water increases strength and cohesion.
c. water reduces strength of clays but raises soil cohesion.
d. water lowers strength and cohesion.
question 41
how do freezing, thawing, wetting and drying contribute to soil creep?
select one:
a. the soil expands and contracts, lifting particles and dropping them a slight distance downslope.
b. gravity exerts a stronger force when soil is wet and thawed.
c. the soil becomes much weaker when dry and frozen.
d. eventually, these cause the soil and regolith to suddenly slide down slope.
question 42
all of the following factors affect mass wasting except for
select one:
a. force due to gravity
b. amount of water
c. geologic age of rocks
d. angle of the slope
question 43
which of the following is one of the most common anthropogenic (man made) cause of mass wasting?
select one:
a. dam construction
b. building construction
c. road construction
d. agriculture
question 44
which type of sediment deposit can fail and lead to a mass wasting event when the amount of water is decreased between the grains?
select one:
a. boulders
b. silt
c. clay
d. sand

Answer 40:  d. Water lowers strength and cohesion.  

Explanation: The most ideal approach to comprehend this is by taking clayey soil and adding water to it. You will see that earth without water is an intense week with great quality. On the off chance that you add water to the blend, the dirt will have lower straight however it by hitting it with the mallet, it will really be somewhat moldable. Along these lines the quality of the strength and cohesion will get lower with lack of water.  

Answer 41: a. The soil expands and contracts, lifting particles and dropping them a slight distance downslope.  

Explanation: Creep, in geography, slow downslope development of particles that happens on each slant secured with free, endured material. Indeed, even soil secured with affectionate turf creeps downslope, as demonstrated by moderate however determined tilting of trees, shafts, tombstones, and different articles set into the ground on slopes. So the dirt extends and contracts, lifting particles and dropping them a slight separation downslope.  

Answer 42:  c. The geological age of the rocks.  

Explanation: Mass squandering happens when the dirt/shake particles that are endured can't be held together and along these lines slide down the outside of an edge. In this way power because of gravity pull the unconsolidated issue down the slant. The measure of water in connection to the stone/soil substance adds to this. Free shake particles will slide effectively because of water. Dirt ingests the water somewhat however in abundance can surrender. The point of the slop chooses how quick squandering can happen. A precarious incline will cause mass squandering effectively when contrasted with a delicate slant.  

Answer 43: c. Road contraction

Explanation: Road compression is the most widely recognized explanation behind mass squandering. Most street development takes puts by slicing through the bedrock-leaving the newly cut roadway uncovered. On the off chance that there is a blamed territory or region that isn't well-vegetated or essentially bedrock strata with a lofty incline, mass squandering can happen. To maintain a strategic distance from this, joining is normally done which incorporates fixing the newly cut shake body surface.  

Answer 44:  d. sand

Explanation: The definition is "an immersed soil mass moving by liquidity down a slant" in light of the fact that "a soaked soil mass" is certifiably not a fluid. Note that both mudflows and avalanches are made out of shake, earth, and garbage. The contrast in the measure of water they contain.  

the correct answer is c.